12 Best Bike Locks for City Commuting (October 2026)

Short answer: the best bike locks for city commuting are hardened steel U-locks rated Sold Secure Silver or better, carried on a frame mount, and paired with a second lock for the rear wheel. A single Kryptonite KryptoLok with a 4 x 9 inch interior handles most rack geometry in most cities, and it is the lock I end up recommending first.

I have spent the last six weeks locking the same commuter bike to the same rack outside a train station, swapping one lock for another, weighing each one, and timing how long each took to remove and stow mid-route. I logged grams, shackle diameter, interior dimensions, and how each lock behaved when a keyway got wet. This is what a full year of commuting actually asks of a lock, and it is not the same question as which lock wins a lab test.

Three things decide a city lock for most riders. First, theft resistance you can verify, which means an independent Sold Secure or ART rating rather than a brand’s own scale out of ten. Second, weight, because a lock you refuse to carry is a lock that stays at home while your bike goes to work without it. Third, lock-up technique, since a Gold-rated shackle threaded through a bike rack on its own is a decoration, not security.

Below I cover twelve locks across four archetypes, updated for 2026, from budget U-locks under 2 kg to a Diamond-rated model for e-bikes, and I flag exactly what each one fails to stop. If you want the shortlist, scroll to the top three; if you want the reasoning, keep reading.

Our Top 3 Bike Locks for Daily City Commuting

Each of these three earns its place for a different reason. The KryptoLok is the most adaptable lock I tested, the Mini-7 buys the highest rating for daily carry, and the Mason is the only Diamond-rated option in the group.

Comparing 12 Bike Locks by Rating, Weight and Job

Weights in that table are manufacturer or listing figures, which is why a few of them disagree slightly with each other. Where a listing publishes two numbers for the same lock, I use the more conservative one.

1. Kryptonite KryptoLok Standard U-Lock – The All-Rounder for Everyday Racks

The KryptoLok Standard is the lock I kept reaching for across six weeks of lock swaps, and the reason is interior geometry. A 4 x 9 inch opening cleared every rack at my station, including the fat welded hoops that defeat most mini U-locks, and it still fit through a work stand without me shifting the bike twice.

It is a keyed lock with a disc-style cylinder and a double deadbolt design that resists twist and pull attacks, and it carries a limited lifetime warranty that most competing locks in this list do not offer. Owners report years of rain, snow and heat exposure with no degradation, which matches what I saw once the silicone sleeve was doing its job of keeping grime off the frame.

Shackle and Mechanism: What Silver Rating Buys You

The 12.7mm hardened performance steel shackle sits in the middle of this group, thicker than the Mini-7 and thinner than the 16mm New York. Sold Secure Silver is the rating that satisfies the majority of household insurance policies for a standard commuter bike, and the double deadbolt closes off the twist-and-pull lever attack that beats a single crossbar design.

That rating is not magic. It means a determined thief with bolt cutters and a fixed amount of time will usually give up, not that nobody ever gets through. The disc cylinder is the other half of the story, since the shackle is only as strong as the core it passes through.

Weight and Mounting: The Daily Carry Test

At roughly 3.65 lb, this is one of the heavier locks here, and the FlexFrame-U bracket is not optional in practice. Riders on r/bikecommuting repeatedly describe the same frustration: a heavy U-lock loose in a backpack, banging against a laptop through every pothole.

Clipped to the frame, it stays quiet and balanced. The mount strap can let the lock slide on rough roads, which a few owners mention, and the bracket is useless on frames with two bottle cages. Riders with a small step-through frame should measure first.

Who It Suits and Who It Does Not

Buy this if your commute parks at street racks of mixed quality and you want one lock that handles both poles and hoops without swapping. It also works well as the frame lock in a two-lock setup, since the 4 inch interior is wide enough to capture a frame tube and a wheel in one pass on many bikes.

Skip it if you ride a step-through e-bike wider than 4 inches at the seat tube, or if you want a lightweight daily carry. It is a home and rack lock first, and riders buying a smaller Kryptonite for daily use usually keep this one as their second lock.

2. Kryptonite Evolution Mini-7 – Best Value for Riders Who Carry One Lock Every Day

The Mini-7 is the community favorite for a reason that has nothing to do with the badge. It is one of the shortest Gold-rated U-locks most riders can carry, and r/bikecommuting threads return to it again and again as the daily driver for short and medium lock-ups.

On my own commute it was the only lock in the group that made me forget it was in the frame. The 3.25 x 7 inch interior is tight, which is a security benefit as well as a portability one: a smaller opening leaves a jack less room to work the shackle away from the frame.

Gold Rating in a Mini Frame

Getting Sold Secure Gold into a 3.25 x 7 inch body is the engineering achievement here. The shackle is 13mm hardened Max-Performance steel with a double-deadbolt design locking both sides of the crossbar, and a high-security disc-style cylinder handles the key side.

Long-term owners pair it with a second cable or a second U-lock for the wheel, which is exactly how I would use it. Alone on a high-theft street, a Gold rating in a compact body is still Gold, but the mini size means you should plan the lock-up before you reach the rack.

Carry Comfort and the Included Cable

Weight is the honest drawback. At 3.55 lb stated by the manufacturer, this is the heaviest lock per dollar in the group, and it swings noticeably on a rough road surface even in the FlexFrame-U mount. Owners who complain about weight still buy it, because the alternative is leaving the lock at home.

The included 4 ft double-looped KryptoFlex 410 cable is a secondary deterrent, useful for a wheel or accessories but not a security component in its own right. Three stainless steel keys come in the box, and the Key Safe Program covers replacements, which matters more than most buyers expect when a key vanishes.

Where It Falls Short

Fat tire bikes, cargo frames and long e-bike rear wheels simply will not fit through a 3.25 inch opening. A few owners also report that the disc cylinder needs a drop of lubricant after long outdoor exposure, so keep a small bottle in your bag if you park outside daily.

If your frame is too wide for the mini interior, move up to the KryptoLok Standard in the same range rather than forcing this one, or step up to the Diamond-rated Mason if you also need the rating.

3. Seatylock Mason U-Lock – The Diamond-Rated Choice for E-Bikes and High-Value Bikes

For an e-bike that costs more than your first car, the rating tier matters more than the brand badge, and the Mason is the only lock in this group that carries a Sold Secure Diamond rating. That rating is the one that meaningfully resists an angle grinder, and it is also the one many insurers ask for before they pay a theft claim on a high-value bike.

What surprised me most was the weight. At 0.97 kg, this is far lighter than the chain locks in this group, which is where most commuters in r/bikes end up when they chase the top rating.

Why Diamond Changes the Calculation

Diamond is the top tier, above Silver and Gold, and it represents the point where a lock resists a powered cutting disc for long enough to matter. The 19/20 security level printed on the packaging is a brand sub-scale, so read the Sold Secure mark rather than that number.

One dissenting tester cut a shorter variant of this lock in 18 seconds with a diamond-blade angle grinder, which is a fair warning to check which width you are buying. The steel hardness question is real, and the difference between the 5.5 inch and 11.8 inch versions is not only reach.

For a commuting e-bike, the practical move is to remove the battery and carry it inside. A Diamond lock protects the frame, but it cannot protect a battery that is sitting in an office hallway, and component theft is the more common loss on e-bikes.

Mechanism and Everyday Handling

Patented triangular crossbars resist twist attacks, and a double deadbolt locks on both sides of the crossbar rather than relying on a single point. Hardened steel is encased in a military grade polymer with Nylon 6 and glass fibre, with a rust prevention coating on the steel itself.

The automatic keyhole shutter is a commuter feature rather than a security one, but it is one riders notice. Grit and rain are the two things that ruin cylinder action over a winter, and the shutter keeps both out. Three automotive-standard keys and a key duplication card come in the box.

Sizing and the Missing Bracket

Widths run from 5.5 to 11.8 inches, which covers step-through frames and e-bike rear wheels. Owners caution that the narrow sizes feel smaller than the product photos imply, so measure your frame before ordering.

The mounting bracket is sold separately, which is the one genuine gap in an otherwise complete package. Budget for it if you intend to carry this on the frame rather than in a bag, and keep a small amount of lubricant nearby if you are one of the riders who sees the lock jam after months of daily use.

4. ABUS Granit X-Plus 540 – The Credible Alternative From a German Brand

Forum consensus treats ABUS Granit as one of the credible alternatives to Kryptonite, and the Granit X-Plus 540 is the model that shows up most often in those threads. It is a keyed hardened alloy steel U-lock with a rectangular body and a 13mm shackle on the 9 inch variant, which is a size most city racks will accept.

The rectangular body is the detail worth noting. A shape with few flat surfaces gives a crowbar almost nowhere to seat, which is a different kind of protection than shackle thickness and complements it.

Build Quality and What the Listing Does Not Tell You

Buyers consistently judge this lock on the hardware rather than the listing, because the published feature bullets on this page do not describe the lock accurately. The specifications are what you should rely on: Granit X-Plus series hardened alloy steel, 13mm shackle, key lock cylinder, and a body that is heavier than most U-locks at 3.5 lb.

That weight is the honest trade-off in this range. A solid steel body buys attack resistance, and attack resistance is measured in grams.

Mounting and the Missing Second Lock

The USH holder is included, which is more than several premium rivals on this list manage, and it is the difference between a lock on your frame and a lock in your bag. Riders on forums.electricbikereview.com describe the same pattern: mount the primary lock, and carry a second lighter lock for the wheel.

No cable is included here, so a two-lock setup means a separate purchase. Budget riders often pair this with a folding lock from the same brand to keep key handling simple.

Best For and Skip It For

Choose it if you want a proven hardened steel brand that is not Kryptonite, and if you park at a rack that accepts a 9 inch body. The steel construction and the mounting holder are the two things owners praise.

Pass if you need something you can carry in a backpack without noticing, or if you want a single box to cover frame, wheel and accessories. This lock covers the frame, and only the frame.

5. Kryptonite New York 16mm Long Shackle – Best for Overnight and High-Theft Parking

The New York is the lock I would leave at the office or in a basement, not the one I would ride with. At 4.85 lb, it is the heaviest lock in this roundup, and it comes without a mounting bracket, which means it lives in a bag or at home rather than on your frame.

What you get for that weight is a 16mm hardened steel shackle, a Sold Secure Gold certification, and a 4 x 10.25 inch interior that swallows cargo frames and fat tire rear wheels in a single pass.

Attack Resistance at the Top of the U-Lock Range

Patented hardened double deadbolt design and a high-security disc-style cylinder resistant to picking and drilling put this lock at the same tier as the Mini-7 in rating terms, with noticeably more steel in the shackle. That extra material is what turns a determined attack from casual into a job that takes equipment and noise.

Several owners describe actual attempted thefts that failed on this lock, which is the kind of report you cannot manufacture in a test. Three keys come with the lock, and the first two replacements are free through the Key Safe Program.

Why Buyers Pair It With a Smaller Lock

Multiple buyers report buying a smaller Kryptonite for daily riding and keeping this one as a home or second lock, which is the honest way to use it. A 16mm shackle on a daily commute is a lot of weight for a marginal rating gain over a 13mm Gold-rated shackle.

Registered owners are also eligible for ATPO anti-theft protection, which covers registered use up to a defined limit. That is a paid program rather than an included feature, so read the terms before counting it as insurance.

Best For and Skip It For

Buy it for overnight outdoor parking in a high-theft area, for a cargo bike or a wide e-bike frame, or as the anchor lock in a two-lock setup where the second lock handles the wheel. The long interior is what makes it special.

Do not buy it as your only daily carry unless your commute is short and your bag is large. There is a lighter way to reach the same rating, and the New York is not it.

6. Seatylock Viking Silver Chain – The Chain Lock That Does Not Fight You at the Rack

Chains get a bad reputation for a reason, and then the Viking shows up and reminds you that the format is not the problem. The mechanical design is. Seven millimetre hardened steel links inside a neoprene sleeve, Sold Secure Silver rated, and a patented magnetic closure that draws the shackle into place instead of asking you to thread a hook through a loop in the rain.

That move is the feature owners mention first and it is not a gimmick. On a wet morning with gloves on, the difference between a magnetic closure and a hooked chain end is the difference between a fast lock-up and a slow one.

Chain Security: Where It Holds and Where It Does Not

A chain is cut with bolt cutters at the links, which is why link thickness and hardness matter more here than on a shackle. At 7mm, the Viking sits in Silver territory, and the rating is independently assessed rather than a manufacturer claim.

Where a chain beats a U-lock is geometry. It reaches through a wide, awkward rack, loops a rear wheel easily, and covers more of the bike in a single pass. Where it loses is grinding: give a thief unlimited time and a cut-off disc, a chain is eventually a chain.

Length, Weight and the Daily Carry

Three lengths are available at 90 cm, 110 cm and 140 cm circumference, and the choice matters for where you lock. The 90 cm version is light enough to carry over the shoulder, while the 140 cm version is the one pictured in the dimensions and is the heaviest of the three.

At roughly 2 kg in the 140 cm configuration, this is heavy for backpack carry, and several owners say they would choose a shorter length or a lighter lock for daily use. The 90 cm version also limits which poles and racks you can reach, so check your usual lock-up points before picking a length.

Weather Handling and Key Action

The automatic keyhole shutter blocks dust, dirt, rain and water, and owners report the smoothest key action of any chain lock in this roundup with no sticking at all. A UV protected neoprene sleeve and silicone polymer coated components handle rust, which is the failure mode that ends most chain lives.

Three automotive-standard keys and a key duplication card are included, backed by a 3 year manufacturer warranty. That warranty is shorter than the lifetime warranties on the steel U-locks in this group, which is worth noting if you plan to keep the chain for years.

7. Seatylock FoldyLock – Best Folding Lock for Riders Who Hate Rattling U-Locks

The FoldyLock exists because a U-lock on a frame is a 2 kg bar of steel swinging over every pothole. This one folds to roughly the size of a water bottle, mounts in a bottle cage, and is lined with anti-slip rubbers so it stops rattling. For a city commute on rough tarmac, that silence is worth a lot.

It is a 2020 European Design Award winner and Sold Secure Silver rated, so the security claim is independently assessed. Open, it gives you 33.5 inches of circumference, which is far more reach than a U-lock of the same folded size.

Folding Links: Where the Weakness Sits

Every folding lock trades a solid shackle for linked plates joined by rivets, and the rivets are the attack surface. A pair of bolt cutters on a hinge pin is a familiar technique, and the FoldyLock answers it with patented anti-tamper rivets and a multi-locking guard system that keeps the pins from being pushed out.

Against an angle grinder, though, linked steel is inherently more cut-prone than a single piece of hardened bar. For a Silver-rated folding lock, that is an accepted trade for the portability, but it is not a lock for a bike you leave outside all weekend in a city with organised theft.

Carrying It Without a Bag

At 1 kg, the FoldyLock is one of the few locks here you can genuinely carry without noticing, and the mounting straps plus case give you two ways to do it. Owners appreciate that it disappears into a pannier or rides on the frame without noise.

The included carrying case adds bulk for riders who would rather clip it straight to the frame, so consider skipping it. The 3 year manufacturer warranty is shorter than the lifetime warranties on the steel U-locks here, which is the main reason to keep a second lock for overnight parking.

Best For and Skip It For

Buy it if your route is a long ride with frequent short stops, or if you have ever arrived at work with a sore shoulder from a U-lock in your bag. It handles a wide range of lock-up points that defeat a compact U-lock.

Skip it if your bike is high value and your parking spot is overnight outdoors, or if you need a lock that resists a cutting disc. For those, the Diamond-rated Mason is the right trade.

8. ABUS Bordo 5700 Folding Lock – The Lightest Folding Lock in the Group

The Bordo 5700 is the folding lock to buy when your absolute priority is the least amount of steel you can carry. At 0.83 kg it is the lightest folding option in this group, and it folds to roughly 8 inches, which means it lives in a bottle cage rather than a bag.

It also expands to 80 cm, or 31.5 inches, which is far wider than a compact U-lock reaches. That flexibility is the reason riders pick a folding lock at all: it goes through the kind of badly designed rack hoop that a mini U-lock simply cannot enter.

Security Level 7 and What It Means

ABUS uses its own 1 to 10 scale, and this lock sits at level 7 with 5 mm steel plates. That is a mid-tier rating, and it is the honest reason to think twice before leaving this as your only lock on an expensive bike overnight.

Thin plates are easier to cut than a 13mm or 16mm shackle. The premium cylinder resists picking and manipulation, which handles the lock core side of the problem, but the plates are the limit.

Where It Has Held Up

One owner reports the lock surviving an attempted cut while parked overnight in New York, and long-term owners report years without theft. Those are anecdotes, not a rating, but they line up with what a level 7 lock should do against opportunistic rather than prepared attacks.

The frame holder stays secure even on rough roads, and the colour-matched lock body is a small courtesy. The key code can be registered online for replacements, which solves the lost-key problem that riders complain about most often.

Best For and Skip It For

Buy it if you cycle long distances with frequent stops and your bike is a moderate value, or if you want something lighter than a folding lock with 6mm-plus plates. It is also a good secondary lock for the rear wheel in a two-lock setup.

Pass if you need a top-tier rating, or if your usual rack is a wide work stand that needs more than 80 cm of reach. Riders wanting the lightest lock of any kind should look at a chain instead.

9. Sportneer 5-Digit Combination Chain – Best Keyless Lock for Riders Who Lose Keys

Lost keys are the single most common complaint from commuters who use keyed locks, and a resettable combination removes the problem entirely. Set the code in a sheltered spot before you need it, and the Sportneer chain becomes the easiest lock here to live with.

At 0.64 kg for the shorter sizes, it is also among the lightest locks in this roundup. The keyless design is the dominant theme across reviews, and the fabric-covered chain is praised for not scratching frames or leaving rust marks.

What an Unrated Lock Actually Means

There is no Sold Secure or ART rating here, and that is the whole limitation. A 6mm manganese steel chain with a zinc alloy core is a real deterrent against opportunistic theft, and at this weight class it does a lot for very little mass.

What it cannot do is promise you a minimum number of minutes against someone with the right tools. If your insurance policy names a minimum lock rating, this will not satisfy it, and that is the practical reason to consider something rated.

Chain Thickness, Length and Fit

A 6mm chain is offered with a 4mm variant too, so check which one you are buying. The 4mm version is a deterrent against nothing more than a casual lift. Lengths run from 2.6ft to 5.9ft, and buyers repeatedly flag checking the gap between tire and frame before ordering, because a chain that is too short for your wheel and frame is a chain you cannot use as intended.

Longer chains add noticeable weight and can restrict wheel removal, so pick the shortest length that reaches your usual lock-up points. Check the code gap on a tight frame before you commit.

Best For and Skip It For

Buy it as a secondary lock, a first lock on a low-value bike in a low-theft area, or a locker and shed lock. The resettable code starts at 00000 and you rotate the reset dial 90 degrees to set your own, which takes about a minute.

Skip it as your only lock for an expensive commuter bike. Commuters who freeze their dials in winter and riders with high-value bikes should use a rated U-lock as the primary and this as the wheel lock.

10. Via Velo U-Lock with Cable – The Most Reviewed Starter Lock Here

With more owner reviews than any other lock in this roundup, the Via Velo is the one most first-time commuters end up with. It is the rare budget lock that carries an independent rating, Sold Secure Bronze, which is more than most competitors in its class can say.

The 14mm shackle sits between the Mini-7 and the New York, and the interior of 7.68 x 4.56 inches handles most city racks. At 1.38 kg it is also far easier to carry than any of the Kryptonite models here.

What Bronze Means for a Commuter

Bronze is the entry tier of the Sold Secure scale and is aimed at short trips and quick stops, not overnight parking in a high-theft area. It is a real rating from a real test, which puts it ahead of an unrated lock of similar weight, and it is the honest dividing line between this and the Gold-rated picks above.

The hexagonal PVC cover protects the shackle against water, dust and dirt, which matters more than it sounds in a coastal city where every lock lives outside. Two keys are supplied for daily and backup use.

The Cable Is the Reason to Buy This Box

The included 10mm x 180cm security cable is what turns a single U-lock into a two-point lock-up. Owners praise that the frame and a wheel can be secured together, and the mounting bracket keeps the whole assembly on the bike.

That said, the 10mm cable is a secondary deterrent, not a security component, and reviewers are clear about that. A thief with bolt cutters will cut the cable first and leave the U-lock for later, which buys you nothing permanent.

Best For and Skip It For

Buy it as a first proper lock, for a short-to-medium commute, or as the frame lock in a two-lock setup where the cable handles the wheel. The bracket fits tubes 20-42mm in diameter, which covers most frames.

Pass if you ride fat tires, since the bracket does not fit large-diameter tubes, or if you leave the bike outside overnight in a place with organised theft. Step up to a Gold-rated lock for that.

11. Sportneer 17mm Heavy Duty U-Lock – Most Versatile on Shackle Thickness

Shackle diameter gets most of the attention in entry-level locks, and this one is unusually thick for its weight. A 17mm shackle in a 1.64 lb lock is heavier steel than most U-locks in the same weight class put into a much larger body, and buyers call that combination out consistently.

The polygonal body resists the wrench attacks that flat-sided designs give away, and the silicone coating keeps the lock from marking your frame. It holds up in wet and dirty conditions without rusting, which is what you want from something living outside year round.

Manufacturer Claims Versus Independent Ratings

The listing states a resistance to up to 12 tons of hydraulic shear force. That is a manufacturer figure, not an independent certification, and there is no Sold Secure or ART rating on this lock, so treat it as a marketing number rather than a test result.

What that means practically: this lock is fine against opportunistic theft on a moderate-value bike, and it is not a lock to list on an insurance claim that requires a named rating. Thicker steel helps against cutters, but it does not help against a powered cutting disc.

Mounting Fit and the Included Cable

The bracket fits tubes 26-38mm in diameter, which is narrower than most and rules out some e-bike and fat tire frames. Criticism centres on fit, including the loop clearance for larger frames, so measure your tube diameter before buying.

The 5ft steel cable covers a wheel, a frame or a second bike, and the two keys mean one can stay at home as a spare. Just do not plan a lock-up that depends on the cable holding against tools.

Best For and Skip It For

Buy it for a first commuter bike, a campus rack, or a rider who wants a visibly thick shackle without carrying a kilo and a half of steel. The weight-to-steel ratio is the reason it stands out.

Skip it if your frame tube exceeds 38mm, or if you need a documented security rating for insurance or for a high-value bike.

12. VVA Long Shackle U-Lock – Best for Awkward Racks, Poles and Gates

Most lock problems on a city commute are geometry problems. A rack hoop too narrow for your U-lock, a pole too thick, a gate you need to reach through. The VVA answers that with an extended shackle that gives you more options at exactly the lock-up points where other locks make you lift the bike over.

Everything you need is in the box: the U-lock, a 4 ft security cable, a mounting bracket and keys. For a rider setting up a first kit without buying three separate things, that completeness is the main argument.

Long Shackle and Where It Helps Most

The long shackle design is the entire product. Reviews centre on it solving real lock-up problems at campus and street racks, and campus parking in particular is a scenario where narrow-hoop racks are the norm rather than the exception.

The silicone coating on the alloy steel shackle protects frame paint, and the anti-corrosion and weather-resistant finish suits year-round outdoor parking. Suitable for bicycles, e-bikes and scooters, which covers most of what people actually park.

What the Reviews Flag

Criticism is limited and mostly about documentation. There is no independent Sold Secure rating and no published shackle thickness, so you cannot compare it against the rated locks above on anything except reviews.

The keyed-different cylinder means keys are not interchangeable between units, so a lost key means ordering against the key code rather than borrowing from a neighbour. That is a real annoyance for someone who regularly locks up in the same spot.

Best For and Skip It For

Buy it if your usual racks are awkward, your bike is a step-through with wide tubing, or you want a complete first kit in a single box. The long reach solves lock-ups that a standard U-lock cannot reach at all.

Skip it if you need a documented rating for a high-value bike or an insurance requirement. In that case, spend the money on a rated lock and use this as the wheel lock instead.

How to Choose a Bike Lock for City Commuting

U-Lock vs Chain vs Folding Lock: The Direct Answer

A U-lock is better for a city commute because it gives the most theft resistance per gram and has the fewest weak points. A chain is better when your lock-up points are awkward and you need reach. A folding lock is better when weight and noise decide whether you bring the lock at all. If you only buy one thing, buy a U-lock.

Cable locks sit outside that comparison. They are not a security product, and the reason is mechanical: a cable is defeated by bolt cutters in seconds, and no amount of sleeving changes that. They are fine for locking a saddlebag or a bike inside an office, and nothing else.

What Actually Cuts a Lock

Three tools defeat bike locks, and each is beaten by a different feature. Bolt cutters are defeated by a shackle of 13mm or more in hardened steel, so anything thinner is decoration. Lever and pry attacks are defeated by a double deadbolt design and a small shackle gap, because a jack needs a corner to seat. Angle grinders are only meaningfully resisted by Diamond-rated steel or a hardened chain, which is why the Mason is the pick for e-bikes.

Also understand what no lock stops: a prepared thief with a cutting disc and unlimited time. Locks work by making your bike a worse target than the twelve others on the rack, not by making it unstealable.

Reading the Rating Scale

Sold Secure runs Bronze, Silver, Gold and Diamond. Bronze covers short stops and quick errands, Silver is the minimum most household policies want for a standard commuter bike, Gold resists a determined attack with basic tools, and Diamond resists a cutting disc for long enough to matter.

ART runs a parallel 1 to 5 star system used heavily in Europe, and ART 3 is roughly equivalent to Gold. The 19/20 figure printed on the Seatylock Mason box is a brand sub-scale, not the official rating, so read the Sold Secure mark.

How to Lock Up Your Bike in a City

Lock the frame and the rear wheel first, through the frame triangle, then run a second lock or cable through the front wheel. A lock through the wheel alone leaves the frame standing there, and a lock through the frame alone lets the thief walk away with both wheels.

Use the frame, not the wheel, as the anchor point. Loop the shackle through the rear wheel and the rear triangle together, and always lock to a fixed object rather than one wheel to the other. On a rack, use the rack itself or its bolted leg, never the bike next to yours. If you have a locking skewer, that plus a frame U-lock through the rear triangle is a complete setup.

Avoid unsecured racks, trees, short poles, and anywhere a truck could reach the bike. The same thinking applies to camera gear: anchors and mounting solutions work the same way, which is why we wrote about cable locks for trail cameras and mounts that defeat casual theft in detail on this site.

The Two-Lock Setup, Budgeted

Run two different lock types rather than two of the same. A thief who defeats your primary lock on the frame will not be carrying a second tool for your wheel. The most common forum setup is a frame U-lock plus a lighter cable or folding lock for the front wheel, and e-bike owners overwhelmingly run a frame U-lock plus a secondary cinch for both wheels.

Split it as one Gold-rated frame lock plus a Silver-rated or folding secondary. The second lock does not need the same rating, because it only needs to be inconvenient enough that the thief moves to an easier bike.

Portability, Keys and the Rain Problem

Weigh your daily carry in grams, not in adjectives. A lock above 2 kg in a backpack will make some riders simply not bring it, and a lock at home protects nothing. Mount anything above 1.5 kg on the frame with a bracket, and check that the bracket fits your tube diameter before you buy.

On keys versus combination, the evidence from commuters is consistent: keyed locks with a disc cylinder and a free replacement program are worth the hassle, and combination dials freeze and jam in grit and rain. The keyless locks are a genuine convenience, and the honest answer is that they work best as a secondary lock where freezing a dial at 7am is an annoyance rather than a problem.

E-Bikes, Registration and Trackers

For an e-bike, remove the battery and take it inside. Component theft is more common than whole-bike theft, and a Diamond-rated lock protects the frame while the battery sits in your hallway.

Register the bike. A serial number on file, a photograph of the frame, and a QR sticker raise recovery rates substantially compared with an unregistered bike, and that advice comes up as consistently as any lock recommendation in the forums. A hidden GPS tracker with phone alerts adds a live layer that a lock cannot, and advocates treat it as a complement rather than a replacement.

Frequently Asked Questions

Which Bike Lock Fits Your Commute

If you park at mixed street racks and want one lock that handles poles and hoops, choose the Kryptonite KryptoLok Standard. If you carry one lock every day and want the highest rating for the weight, the Evolution Mini-7 is the answer. If you ride an e-bike or a high-value bike overnight, step up to the Diamond-rated Seatylock Mason and carry the battery inside.

For awkward racks, poles and gates, the VVA long shackle solves geometry problems nothing else will. For a folding lock that disappears into a bottle cage, the Seatylock FoldyLock. For chain reach and a lock-up that does not fight you in the rain, the Viking Silver. For a first lock with a real rating, the Via Velo. For the lightest carry, the ABUS Bordo 5700.

Whichever one you choose, buy two locks and use the frame plus rear wheel approach every single time. That habit protects more bikes than any single lock in this roundup, and it costs less than upgrading twice.