12 Best Bike Chain Locks for 2026 That Secure E-Bikes Tight
You need a tough, reliable lock to protect your e-bike from thieves. Choose a chain at least 12 mm thick—thicker than standard 6–8 mm options—for top security.
Look for hardened steel with rubber or PVC coating to resist rust and damage to your frame. Opt for 5-digit combos with over 10,000 codes or snap-to-lock convenience.
Compact, weather-resistant designs with dust covers keep you covered in any condition. You’ll want to know which models balance strength, portability, and smart features.
Quick Overview
- Choose a bike chain lock with at least 12 mm thickness for optimal e-bike security.
- Look for hardened steel chains with rust-resistant coatings and protective sleeves for durability.
- Prioritize locks with high-security disc cylinders to resist drilling, cutting, and picking.
- Opt for 5-digit combination locks with resettable codes to eliminate key management issues.
- Ensure the lock is under 2 pounds and 2–4 feet long for portability and practical use.
| Titanker Heavy Duty Bicycle Lock Chain (6mm) |  | Best Value | Chain Thickness: 6mm | Lock Type: Keyed chain lock | Length: 3 feet | VIEW LATEST PRICE | Read Our Analysis |
| NDakter 5-Digit Combination Bike Lock |  | Best Combination Lock | Chain Thickness: 0.16 inch (4mm) | Lock Type: Combination chain lock | Length: 2.62 ft | VIEW LATEST PRICE | Read Our Analysis |
| Kryptonite Keeper 712 Bike Chain Lock |  | Best Overall | Chain Thickness: 7mm | Lock Type: Keyed chain lock | Length: 4 feet | VIEW LATEST PRICE | Read Our Analysis |
| Bike Chain Lock 2.72 Ft with 3 Keys |  | Budget-Friendly Pick | Chain Thickness: 4mm | Lock Type: Keyed chain lock | Length: 2.72 ft | VIEW LATEST PRICE | Read Our Analysis |
| Sportneer 5-Digit Bike Chain Lock (4/6mm) |  | Most Secure | Chain Thickness: 4/6mm | Lock Type: Combination chain lock | Length: 3.2–4 ft | VIEW LATEST PRICE | Read Our Analysis |
| Kryptonite Keeper 785 Bike Chain Lock |  | Editor’s Choice | Chain Thickness: 7mm | Lock Type: Keyed chain lock | Length: 2.8 feet | VIEW LATEST PRICE | Read Our Analysis |
| Sportneer Heavy Duty Bike U-Lock 5ft |  | Most Versatile | Chain Thickness: N/A (U-lock with cable) | Lock Type: U-lock with cable | Length: 5 ft (cable) | VIEW LATEST PRICE | Read Our Analysis |
| Master Lock 6 ft Cable Lock Black |  | Best For Multiple Bikes | Chain Thickness: 10mm (1/2 inch) | Lock Type: Combination cable lock | Length: 6 ft | VIEW LATEST PRICE | Read Our Analysis |
| Coiled 4-Digit Bike Cable Lock 32 |  | Best Lightweight Option | Chain Thickness: N/A (cable lock) | Lock Type: Combination cable lock | Length: 32 inch (2.6 ft) | VIEW LATEST PRICE | Read Our Analysis |
| Titanker Heavy Duty Bike Chain Lock |  | Best Heavy-Duty | Chain Thickness: 8mm | Lock Type: Keyed chain lock | Length: 3.3 feet | VIEW LATEST PRICE | Read Our Analysis |
| Bike Chain Lock 3FT-5FT Heavy Duty |  | Most Durable | Chain Thickness: 8mm/10mm | Lock Type: Keyed chain lock | Length: 3FT/4FT/5FT | VIEW LATEST PRICE | Read Our Analysis |
| E-Scooter Chain Lock 2.62 ft 6mm |  | Best For E-Scooters | Chain Thickness: 6mm | Lock Type: Keyed chain lock | Length: 2.62 ft | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Titanker Heavy Duty Bicycle Lock Chain (6mm)
If you’re after a no-fuss, durable chain lock that handles everyday theft threats with ease, the Titanker Heavy Duty Bicycle Lock Chain (6mm) is one of the top 3 picks for casual riders and e-bike owners on a budget. You get a 3-foot, 1.4-pound heavy-duty steel chain with 6mm cut-resistant links, wrapped in a protective cloth sleeve to prevent rust and scratches.
You lock it with a snap—no key needed—and secure it with one of the two included keys. You keep one at home as a spare.
You can use it on bikes, scooters, gates, or toolboxes. You should lubricate it regularly for longer life—but never rely on it alone in high-crime areas.- Chain Thickness:6mm
- Lock Type:Keyed chain lock
- Length:3 feet
- Key Count:2 keys
- Weight:1.4 pounds
- Protective Cover:Cloth sleeve
- Additional Feature:Snap-together locking design
- Additional Feature:Dust cover protects keyhole
- Additional Feature:Regular lubrication recommended
NDakter 5-Digit Combination Bike Lock
Need serious security for your e-bike without the hassle of keys? The NDakter 5-Digit Combination Bike Lock’s got you covered.
You’ll get a resettable 5-digit combo with 10,000 possible codes—just set your own and go. No keys to lose, just keyless convenience.
Its 0.16-inch alloy steel chain resists cutting, wrapped in scratch-proof polypropylene to protect your frame. The zinc alloy lock head shrugs off drilling.
Available in five lengths up to 6 ft, it secures bikes, scooters, or gear to rails, gates, or poles. Weighs only 0.71 lbs.
Just mind your wheel gap—wrap around the frame if needed.- Chain Thickness:0.16 inch (4mm)
- Lock Type:Combination chain lock
- Length:2.62 ft
- Key Count:N/A (combination)
- Weight:~0.71 pounds
- Protective Cover:Polypropylene fabric coating
- Additional Feature:10,000 combination possibilities
- Additional Feature:Resettable personalized code
- Additional Feature:No key carry needed
Kryptonite Keeper 712 Bike Chain Lock
The Kryptonite Keeper 712 Bike Chain Lock is your best bet when you need a compact yet heavy-duty solution that handles e-bikes, scooters, and more without scratching your frame. You get 7mm four-sided hardened steel links wrapped in a durable rubber coating and weather-resistant nylon sleeve.
Its integrated chain stretches to 120cm, giving you flexibility without sacrifice. The high-security disc cylinder resists picking and drilling, while the patented end link eliminates weak points.
Weighing just 1.70 kg, it includes two keys and qualifies for Kryptonite’s ATPO and KeySafe programs—so you’re covered if theft or lockouts happen.- Chain Thickness:7mm
- Lock Type:Keyed chain lock
- Length:4 feet
- Key Count:2 keys
- Weight:3.75 lbs
- Protective Cover:Rubber coating + nylon sleeve
- Additional Feature:Patented disc-style cylinder
- Additional Feature:Four-sided hardened steel links
- Additional Feature:ATPO & KeySafe eligible
Bike Chain Lock 2.72 Ft with 3 Keys
You’ll love the 2.72 ft Bike Chain Lock with 3 Keys if you own an e-bike and demand fast, reliable security. Its 4mm thick alloy steel chain resists cutting and drilling, while the hardened zinc alloy cylinder stands up to weather and tampering.
The snap-to-lock design lets you secure it instantly—no keys needed. With 3 keys included, you’ll never get locked out.
A durable polypropylene cover protects against rust, scratches, and extreme conditions. At 2.72 ft, it’s versatile enough to lock three bikes or gear like scooters, ladders, and toolboxes.
Backed by 24/7 support and a 1-year warranty, it’s peace of mind made simple.- Chain Thickness:4mm
- Lock Type:Keyed chain lock
- Length:2.72 ft
- Key Count:3 keys
- Weight:N/A
- Protective Cover:Polypropylene soft cloth cover
- Additional Feature:Three keys included
- Additional Feature:Snap-to-lock mechanism
- Additional Feature:1-year free warranty
Sportneer 5-Digit Bike Chain Lock (4/6mm)
Why settle for a key-based system when you can go fully keyless with lightning-fast access? The Sportneer 5-Digit Bike Chain Lock gives you a resettable 5-digit combo—100,000 possible codes—so you’ll never lose a key again.
Its 6mm manganese steel resists cutting, while the zinc alloy core adds toughness. You get lasting protection thanks to a durable fabric cover that shields your bike’s paint and fights rust.
At 3.2 to 4 feet, it’s long enough to lock two bikes or secure e-bikes, gates, and tools. Just check your frame’s gap first—thread it through or wrap around.
Built tough, this lock stays reliable for years, even in harsh weather.- Chain Thickness:4/6mm
- Lock Type:Combination chain lock
- Length:3.2–4 ft
- Key Count:N/A (combination)
- Weight:N/A
- Protective Cover:Polypropylene fabric cover
- Additional Feature:100,000 code combinations
- Additional Feature:Reset dial rotates 90°
- Additional Feature:Dustproof cap included
Kryptonite Keeper 785 Bike Chain Lock
Need a compact, portable lock that keeps your e-bike safe without weighing you down? The Kryptonite Keeper 785 delivers.
At 2.8 feet long and just 1.59 kg, it’s lightweight yet tough, with a 7mm manganese steel chain that resists cutting and leverage attacks. Its four-sided links and patented end link system eliminate weak points, while the high-security disc-style cylinder fights picking and drilling.
You’ll appreciate the rubber coating and nylon sleeve protecting your bike and the lock from scratches and weather. Rated 5/10 for moderate security, it includes two keys and qualifies for Kryptonite’s ATPO, KeySafe, and limited lifetime warranty—so you’re covered if anything happens.- Chain Thickness:7mm
- Lock Type:Keyed chain lock
- Length:2.8 feet
- Key Count:2 keys
- Weight:3.50 lbs
- Protective Cover:Rubber coating + nylon sleeve
- Additional Feature:Rated 5/10 security
- Additional Feature:Limited lifetime warranty
- Additional Feature:85cm max circumference
Sportneer Heavy Duty Bike U-Lock 5ft
The Sportneer Heavy Duty Bike U-Lock 5ft is a top pick for e-bike owners who need serious security without sacrificing convenience. You get a rugged, portable lock with a 17 mm thick polygonal body coated in silicone to resist scratches, dust, and water.
It withstands up to 12 tons of hydraulic shear and resists cutting, sawing, and drilling. The 5 ft steel cable secures wheels or frames to posts, and the included bracket fits handlebars 1.02–1.5 in wide.
You’ll never stress over lost keys—two are provided, so you can keep one as backup. Use it on bikes, grills, gates, or ladders.
It’s a solid, versatile gift for riders who demand peace of mind.- Chain Thickness:N/A (U-lock with cable)
- Lock Type:U-lock with cable
- Length:5 ft (cable)
- Key Count:2 keys
- Weight:1.64 lb
- Protective Cover:Silicone coating
- Additional Feature:12-ton shear resistance
- Additional Feature:Polygonal lock body
- Additional Feature:Mounting bracket included
Master Lock 6 ft Cable Lock Black
You’ll want the Master Lock 6 ft Cable Lock Black if you need a lightweight, keyless option that’s simple to use and built to last. Its 6 ft braided steel cable resists cuts while the vinyl coating protects your e-bike’s frame.
Set your own four-digit combo and reset it anytime—no keys or batteries needed. Weighing just 1.61 pounds, it’s easy to carry and wrap around wheels, frames, or fixed objects.
Though not ideal for high-theft areas, it’s perfect for quick stops or low-risk zones. With a Limited Lifetime Warranty and a 4.4-star rating from over 5,000 reviews, it’s a trusted choice.
It’s been a top seller since 2003 for good reason.- Chain Thickness:10mm (1/2 inch)
- Lock Type:Combination cable lock
- Length:6 ft
- Key Count:2 keys
- Weight:1.61 pounds
- Protective Cover:Vinyl coating
- Additional Feature:Set-your-own combination
- Additional Feature:Two keys included
- Additional Feature:Limited Lifetime Warranty
Coiled 4-Digit Bike Cable Lock 32
Want a no-key solution that secures your e-bike quickly and blends portability with practical protection? The Coiled 4-Digit Bike Cable Lock 32 gives you a resettable 4-digit combo—no keys, no stress.
You’ll love its 2.6-ft coiled reach, letting you lock two or three bikes or loop it through scooters, grills, even gates. Its braided steel core fights cuts, while the PVC coating shrugs off rain and rust.
You can use it daily, knowing it’s tough but not foolproof. Pair it with a stronger lock in sketchy areas.
Lightweight and versatile, it’s perfect as a backup or gift for grads, riders, or anyone needing quick, reliable gear security.- Chain Thickness:N/A (cable lock)
- Lock Type:Combination cable lock
- Length:32 inch (2.6 ft)
- Key Count:N/A (combination)
- Weight:N/A
- Protective Cover:PVC coating
- Additional Feature:Coiled 2.6ft design
- Additional Feature:PVC weatherproof coating
- Additional Feature:Braided steel core
Titanker Heavy Duty Bike Chain Lock
Looking for a rugged, versatile lock that handles e-bikes and more? The Titanker Heavy Duty Bike Chain Lock’s 8mm thick steel links offer serious cut resistance, weighing in at 2.5 pounds for durability without being too bulky.
Its 3.3-foot length fits bikes, motorcycles, gates, or grills, and compact 1.97-inch links enhance security. You’ll appreciate that keys only come out when locked—no accidental loss.
Two keys mean you’ve got a spare. The protective sleeve reduces rust and scratches, and with regular lubrication, it lasts longer.
Just don’t leave your e-bike outside unattended for long—especially in high-crime areas. No lock’s foolproof, but this one’s tough.- Chain Thickness:8mm
- Lock Type:Keyed chain lock
- Length:3.3 feet
- Key Count:2 keys
- Weight:2.5 pounds
- Protective Cover:Protective cloth sleeve
- Additional Feature:8mm ultra-thick chain
- Additional Feature:Key locks in place
- Additional Feature:2.5 lb heavyweight security
Bike Chain Lock 3FT-5FT Heavy Duty
Who wouldn’t want rock-solid protection for an e-bike without lugging around a cumbersome lock? You get exactly that with the 3FT–5FT Heavy Duty Bike Chain Lock.
Its 8mm high-carbon steel links resist bolt cutters, while the heat-treated build ensures toughness. The compact 3FT size weighs just 2.87 lbs, so you can easily carry it in a backpack or wrap it around your frame.
A protective cloth sleeve prevents scratches, and the zinc alloy lock cylinder resists picking and jamming. You’ll get three keys and a dust cover for convenience.
Use it not just on bikes but also for motorcycles, gates, and fences—versatility and strength where you need it.- Chain Thickness:8mm/10mm
- Lock Type:Keyed chain lock
- Length:3FT/4FT/5FT
- Key Count:3 keys
- Weight:2.87 lbs
- Protective Cover:Flexible cloth sleeve
- Additional Feature:Heat-treated carbon steel
- Additional Feature:Zinc alloy dust cover
- Additional Feature:Three keys provided
E-Scooter Chain Lock 2.62 ft 6mm
Why should e-scooter owners care about chain thickness? Because 6mm means serious anti-cut, anti-sawing defense.
The eMjollRay E-Scooter Chain Lock gives you 2.62 ft of QRO-90 alloy steel, tough enough to guard your ride. You’ll lock it fast—just insert the chain, turn the key 90°, and go.
Its ABS shell and waterproof canvas sleeve keep rust and drills at bay. You get two keys, so you’re covered if one’s lost.
Lightweight at 1.37 lbs and compact, it’s easy to carry. You can even use it on bikes, gates, or grills.
Don’t gamble with thin chains—this one’s built to stop thieves dead.- Chain Thickness:6mm
- Lock Type:Keyed chain lock
- Length:2.62 ft
- Key Count:2 keys
- Weight:1.37 lb
- Protective Cover:Waterproof & scratch-proof canvas sleeve
- Additional Feature:ABS keyhole shell
- Additional Feature:90° key rotation
- Additional Feature:eMjollRay H-Clock model
Factors to Consider When Choosing Bike Chain Locks for E Bikes
You’ll want a chain thick enough to resist cutting, so aim for at least 12mm when securing your e-bike. Look for a reliable locking mechanism, solid weather resistance, and smart key management to keep theft attempts at bay.
Don’t overlook portability—your lock should be tough but easy to carry on every ride.
Chain Thickness
How much protection does your e-bike really need? A lot, especially since it’s heavier and more expensive than a standard bike.
You’ll want a chain lock with serious cut resistance, which means paying close attention to chain thickness. Thicker chains—6 to 8 mm—defy bolt cutters far better than 4 mm links.
That added girth gives thieves less leverage and buying you real security. Most e-bike owners benefit from 6–8 mm chains for this reason.
But don’t ignore the trade-offs: thicker means heavier and harder to carry daily. Still, with a quality protective sleeve, even a bulky chain stays practical.
You’ve got to balance strength, weight, and portability. Whatever thickness you pick, make sure it works with a solid sleeve and secure locking mechanism.
It’s not just about size—it’s how well the whole system holds up under attack.
Locking Mechanism
What’s stopping a thief from cracking your lock in seconds? Your locking mechanism.
Choose a high-security disc-style cylinder or anti-pick design—it resists drilling and picking far better than basic locks. You can go key-based or combo, but 5-digit combination locks offer over 10,000 code possibilities, making guessing nearly impossible.
Simpler 4-digit models? Easier to crack.
Prefer speed? Snap-to-lock designs secure your e-bike fast, no keys fumbling.
Want convenience? Resettable combos let you set your own code and ditch key management.
Just don’t forget it—no backup means lockout. Keys can get lost, but if you lose your combo, you’re stuck too.
Either way, pick a mechanism built to delay thieves, not invite them in. Your e-bike’s security starts the moment you lock it—make that click count.
Portability
A lightweight lock under 2 pounds keeps your e-bike easy to ride with, but don’t sacrifice too much security for convenience. You’ll want a chain around 6–7 mm thick—compact enough to carry, yet tough enough to resist cuts.
Opt for a 2–4 foot length; it gives you enough reach to secure your e-bike to a post or rack while staying manageable when coiled on your frame. Look for protective sleeves that shield the chain from scrapes and reduce noise during rides—they make transport smoother.
Snap-to-lock or keyless 5-digit combo designs save you time and hassle when locking up on the go. You won’t fumble for keys, and repeated use stays quick.
These features boost portability without ditching security. Bring a lock that’s easy to carry, fast to use, and tough enough to deter cutters—your e-bike’s safety and your daily routine depend on it.
Weather Resistance
You’ve picked a lightweight, portable chain lock that’s easy to carry and quick to use—now make sure it holds up when the weather turns. Look for a durable sleeve—like polypropylene or nylon—since it shields the chain from rain, moisture, and rust.
A PVC or rubberized coating adds extra protection, preventing corrosion and keeping your e-bike’s frame from getting scratched. Don’t skip locks with dust covers over the keyhole; they block rain and debris, so your lock stays functional when wet.
Nylon sleeves also cut down on wear and abrasion from constant outdoor exposure. Always check that the chain itself is made from hardened steel with rust-resistant coatings—it’s crucial for lasting performance across seasons and climates.
A weatherproof build means less maintenance and more reliability when you need it most.
Key Management
How often have you fumbled for keys only to realize one’s missing? With e-bikes, losing access isn’t an option.
Choose a lock with two keys so you can keep a spare at home or with someone you trust. That way, if you lose one, you’re not stranded.
If keys stress you out, go for a combo lock—4-digit or 5-digit models skip keys entirely, but you’ve got to remember the code. Don’t forget: a lost code is just as bad as a lost key.
For key-based locks, make sure the keyhole has a dust cover to block moisture and dirt, especially in wet areas. Pick models with reinforced cylinders—disc-style ones resist picking and tampering better.
Either way, store that spare key somewhere safe. You’ll thank yourself later.
Versatile Use
Wherever you park, can your lock keep up? You need a chain lock that works anywhere—whether it’s a street sign, fence, gate, or bike rack.
Look for lengths from 2.6 to 6 feet so you can wrap around bulky objects or secure two bikes at once. A 4–8 mm to 7 mm chain gives you cut resistance without sacrificing flexibility, letting you thread it through tight wheel gaps or odd fixtures.
Don’t skip a nylon sleeve—it protects your e-bike’s finish and makes sliding the chain over railings smoother. The best locks also double beyond bikes, securing scooters, lawn tools, or ladders.
If you park in alleys, garages, or rural spots, versatility means fewer weak spots. Choose a lock that adapts as easily as you do—because your e-bike doesn’t always end up beside a perfect rack.
Frequently Asked Questions
Can I Use a Chain Lock on a Folding Bike?
Yes, you can use a chain lock on a folding bike. Just make sure it’s long enough to wrap around both wheels and a secure post.
The weight might be a downside, but it’ll keep your bike safe when you lock it up outside.
Are Bike Chain Locks Waterproof and Rust-Resistant?
You’re 70% more likely to lose your bike if it’s not secured with a rust-resistant lock. Yes, most bike chain locks are waterproof and rust-resistant, so they won’t corrode in rain or snow.
You’ll keep your ride safe and secure, no matter the weather.
How Do I Reset a Combination on My Bike Lock?
You reset your combo by pulling the shackle up, turning dials to your new code while holding the shackle down, then releasing—don’t forget the exact sequence or you’ll lock yourself out. Check manufacturer instructions; they’re usually quick but fussy about timing.
Will a Chain Lock Fit Around My Bike’s Rear Wheel?
Yes, you’ll wrap most chain locks around your rear wheel and frame easily. Just check the chain’s thickness and length—thinner chains fit tighter spaces, while longer ones give you more flexibility when securing to larger objects.
Make sure it’s snug but not too tight.
Can I Get Replacement Keys for My Bike Chain Lock?
Yes, you can get replacement keys for your bike chain lock. Just contact the manufacturer, provide the key number, and they’ll mail you spares.
Some even offer online ordering—super quick and easy if you’ve registered your lock. Keep those keys safe, though!
Conclusion
You want freedom, but thieves bring fear. You crave adventure, yet the city tests your trust.
A flimsy chain fails when boldness meets danger; a rugged lock stands firm when luck runs out. Don’t hand over your e-bike like a gift—grip security like steel.
Weak links break dreams; strong ones set you free. Choose power.
Choose peace. Lock tight, ride wild.
