Updated: 01 Apr 2026

9 Best bike locks high security cut proof 4 digit combinations of 2026

Explore up to 41% Off

Updated: 01 Apr 2026

#1

Best Choice

SIGTUNA Bike Lock - 16mm Heavy Duty Bicycle U Lock Shackle and Mount Holder, 1.2m Steel Chain Cable and 3 High-Security Keys for Road Bike, Electric Bike, Folding Bike, Mountain Bike

9.9

SIGTUNA

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【Robust and Pick-resistant】This d lock has a high-security disc-style cylinder and double deadbolt locking mechanism, very effective and certified against leverage attacks. With Sigtuna U-lock, you make the right choice and give thieves no chance!

【High Safety Level】This awarded SIGTUNA bike lock is made of 16mm high-performance steel for extensive holding power and resistance against cut and leverage attacks with a wapping high security rating. Suit for bicycles, motorcycles, gates and fences,etc. Get the best security available and protect your ride with Sigtuna bicycle lock!

【Double Bolt for Double Protection】Bike locks are designed as a double lock mechanism and have a 1.2 metre long cable that allows you to attach your bike to the crossbar to prevent pulling and prying up
#2

Best Value

Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

9.6

Sportneer

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Portable & Rugged: The Sportneer bike u lock is both portable and heavy-duty. It measures 7.76x5.02inches, with a thickness of 0.67inches/17mm, and weights 1.64lbs. Plus, its unique polygonal lock body design and silicone coating resist water, dust, and dirt, keeping your bike scratch-free and in tip-top shape.

Easy to Install & Use: Equipped with a 5ft steel cable and a bracket, the bike lock can secure wheels, frames, or other bikes to posts, fences, or poles. Better yet, the bracket fits bike tubes with a diameter under 26mm/1.02inch-38mm/1.5inch, allowing you to lick your bike with ease.

Boosted Security & Anti-Theft: Thanks to the zinc alloy lock core and alloy steel lock head, this bike U-lock can withstand hydraulic shear forces up to 12 tons. It‘s tough as nails, resisting cutting, sawing, smashing, and drilling to protect your bike from potential theft.
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#3

Bicycle Chain Lock, Sportneer High Security 5-Digit Resettable Combination Anti-Theft Bike Locks, Portable Outdoors Road Bike Chain Lock for Mountain Bicycles

9.5

Sportneer

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Scratch-Resistant Cover & Dustproof Cap: The flexible high-quality polypropylene fabric cover protects your hands against heat or cold, and prevents chain from rust, and keeps the bike paint from scratches, ensuring the lock lasts for years to come. Plus, the dustproof cap is an added bonus, keeping rainwater and sand out of the lock hole.

Rock-solid & Built to Last : The Sportneer bicycle lock is as tough as nails. Crafted from ultra-thick 0.236"/6mm manganese steel, it boasts unparalleled resistance against cutting and sawing. The lock core, made from sturdy zinc alloy, adds an extra layer of protection, thwarting any attempts at malicious cutting and ensuring long-lasting durability.

High Security & Keyless Design: Say goodbye to the hassle of carrying keys and hello to keyless convenience. The advanced 5-digit combination lock offers unparalleled protection, with up to 100,000 possible combinations, making it virtually impossible to crack. This bike chain lock is the perfect choice for those who value safety and convenience above all else.
#4

Combination Bike Cable Lock - 4 Digit, 32 inch Long Coiled Security Resettable Cable Lock, Anti-Theft Accessories for Mountain Bike, Road Bike, Electric Bicycle, Scooter

9.3

Jokmae

-41%

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Multipurpose for any occasion: 2.6 ft, (80cm) long enough to lock 2-3 bikes together. Lock was used for bicycles, autocycle, skateboards, stroller, luggage, grills, fences, sports equipment, ladders, iron sliding door gates, others you want to protect

Keyless convenience lock: Never have to worry about forgetting to bring the key because it is in your brain, you have code! Easy to set and reset your combination. Perfect Back to School, Graduation, Birthday gift

Keep your bike safe: Smart 4-Digit Resettable cable lock, Made of high strength braided steel wire and anti-rust zinc alloy, strong cut resistance. PVC coating helps cables lock more durable against hard environment

-41%
#5

Bike U-Lock and Cable Combo 190X14Mm Ulock 1800X10Mm Cable Via Velo Brand

9.2

Via Velo

-20%

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Main highlights

SOLD SECURE BRONZE CERTIFIED – This Via Velo bike lock model is Sold Secure Bronze certified, ensuring that this specific lock meets industry standards for reliable protection during short trips and quick stops.

MATERIAL QUALITY OVER THICKNESS – Our locks are crafted from hardened steel, emphasizing that bike lock security depends on material quality such as hardness, impact resistance, and cut resistance rather than just thickness.

DURABLE ALL-WEATHER PROTECTION – The hexagonal PVC cover protects against water, dust, and dirt, extending the lock’s lifespan and delivering dependable performance in all conditions.

-20%
#6

Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

8.9

Sportneer

-15%

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Main highlights

Portable & Rugged: The Sportneer bike u lock is both portable and heavy-duty. It measures 7.76x5.02inches, with a thickness of 0.67inches/17mm, and weights 1.64lbs. Plus, its unique polygonal lock body design and silicone coating resist water, dust, and dirt, keeping your bike scratch-free and in tip-top shape.

Easy to Install & Use: Equipped with a 5ft steel cable and a bracket, the bike lock can secure wheels, frames, or other bikes to posts, fences, or poles. Better yet, the bracket fits bike tubes with a diameter under 26mm/1.02inch-38mm/1.5inch, allowing you to lick your bike with ease.

Boosted Security & Anti-Theft: Thanks to the zinc alloy lock core and alloy steel lock head, this bike U-lock can withstand hydraulic shear forces up to 12 tons. It‘s tough as nails, resisting cutting, sawing, smashing, and drilling to protect your bike from potential theft.

-15%
#7

Sportneer Bike Lock: 8mm Thick High Security Anti Theft Bike Chain Lock with 2 Keys- 3.2ft Long Heavy Duty Anti-Cut Bicycle Lock for Bike, Motorcycle, Bicycle, Door, Gate, Fence, Grill

8.8

Sportneer

-15%

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Main highlights

【UNIQUE WATERPROOF&DIRT-PROOF CAP】A dirty keyhole makes it difficult to open your lock, so to keep it dry and safe, we include a water and dust-proof cap for dirt and rust prevention. (Note: For longer service life, please add anti-rust solution into the keyhole on a regular basis.)

【METAL LOCK HEAD】Sportneer upgraded the lock head from general ABS plastic material to hammer-proof metal material, anti-rust coating, which ensures the bicycle lock more resistant to hammering than other locks on market. Besides, no matter what angle or object you’re trying to lock to, the 360° bike locks head swivel design makes it super easy to lock to anything.

【8MM DIAMETER ULTRA-THICK CHAIN】The thicker the bike lock chain, the more secure your property. Compared with common 6mm/0.24inch thick, Sportneer provide heavy duty bike lock measures 8mm/0.32inches thick. Made of premium manganese steel, it’s cut and shear resistant to prevent bike theft.

-15%
#8

Sportneer Bike Lock: 8mm Thick High Security Anti Theft Bike Chain Lock with 2 Keys- 3.2ft Long Heavy Duty Anti-Cut Bicycle Lock for Bike, Motorcycle, Bicycle, Door, Gate, Fence, Grill

8.7

Sportneer

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Main highlights

【UNIQUE WATERPROOF&DIRT-PROOF CAP】A dirty keyhole makes it difficult to open your lock, so to keep it dry and safe, we include a water and dust-proof cap for dirt and rust prevention. (Note: For longer service life, please add anti-rust solution into the keyhole on a regular basis.)

【METAL LOCK HEAD】Sportneer upgraded the lock head from general ABS plastic material to hammer-proof metal material, anti-rust coating, which ensures the bicycle lock more resistant to hammering than other locks on market. Besides, no matter what angle or object you’re trying to lock to, the 360° bike locks head swivel design makes it super easy to lock to anything.

【8MM DIAMETER ULTRA-THICK CHAIN】The thicker the bike lock chain, the more secure your property. Compared with common 6mm/0.24inch thick, Sportneer provide heavy duty bike lock measures 8mm/0.32inches thick. Made of premium manganese steel, it’s cut and shear resistant to prevent bike theft.
#9

ROCKBROS Bike Lock Chain Bicycle Lock, Heavy Duty Anti Theft, 3.2 Ft Long, 6mm Thick Bike Chain Lock with Key Set, Cut Proof Security Scooter Lock Commuter Lock for Door, Gate, Fence

8.6

ROCKBROS

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Main highlights

THICKER CHAIN LOCK: The bike lock chain is made of 5mm thicker strength metal with 420D nylon protective sleeves, which is strong enough to provide an anti-theft performance.

PROFESSIONAL KEY CARVING: The key is used with the newest carving tech that can use for many years.

HIGH STRENGTH LOCK: The bicycle chain lock has a strong cylinder. It is very durable and corrosion resistance.

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9 Best bike locks high security cut proof 4 digit combinations of 2026

SIGTUNA Bike Lock - 16mm Heavy Duty Bicycle U Lock Shackle and Mount Holder, 1.2m Steel Chain Cable and 3 High-Security Keys for Road Bike, Electric Bike, Folding Bike, Mountain Bike

9.9

Main highlights

Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

9.6

Main highlights

Bicycle Chain Lock, Sportneer High Security 5-Digit Resettable Combination Anti-Theft Bike Locks, Portable Outdoors Road Bike Chain Lock for Mountain Bicycles

9.5

Main highlights

Combination Bike Cable Lock - 4 Digit, 32 inch Long Coiled Security Resettable Cable Lock, Anti-Theft Accessories for Mountain Bike, Road Bike, Electric Bicycle, Scooter

9.3

Main highlights

Bike U-Lock and Cable Combo 190X14Mm Ulock 1800X10Mm Cable Via Velo Brand

9.2

Main highlights

Sportneer Bike Lock: Heavy Duty Anti Theft Bike U Lock with 150cm Security Steel Cable - 17mm Shackle Bicycle U-Locks with Keys for Road Mountain Electric & Folding Bike (Black)

8.9

Main highlights

Sportneer Bike Lock: 8mm Thick High Security Anti Theft Bike Chain Lock with 2 Keys- 3.2ft Long Heavy Duty Anti-Cut Bicycle Lock for Bike, Motorcycle, Bicycle, Door, Gate, Fence, Grill

8.8

Main highlights

Sportneer Bike Lock: 8mm Thick High Security Anti Theft Bike Chain Lock with 2 Keys- 3.2ft Long Heavy Duty Anti-Cut Bicycle Lock for Bike, Motorcycle, Bicycle, Door, Gate, Fence, Grill

8.7

Main highlights

ROCKBROS Bike Lock Chain Bicycle Lock, Heavy Duty Anti Theft, 3.2 Ft Long, 6mm Thick Bike Chain Lock with Key Set, Cut Proof Security Scooter Lock Commuter Lock for Door, Gate, Fence

8.6

Main highlights

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