Cycling
NDakter 5-Digit Combo Heavy-Duty Bicycle Chain Lock (3.2/4.27/5 ft)
Review
Resettable five-digit combination: This chain lock features a 5-digit code that you can customize and reset yourself, offering 10,000 possible combinations and eliminating the need to carry a key. The unit ships with the factory code set to 00000.
Solid build and materials: The locking cylinder is constructed from zinc alloy for corrosion resistance and added toughness. The chain is made from 0.24-inch (6 mm) alloy steel links designed to resist cutting and prying attempts, helping slow down opportunistic thieves.
Protective sleeve: A polypropylene fabric cover surrounds the chain to prevent scratches and chips to your bike’s paint. The sleeve is designed to be wear-resistant and to keep the metal from getting too hot or cold to handle comfortably.
Lengths and weight: Available in multiple lengths — 3.2 ft (approx. 1.45 lb), 4.27 ft, and 5 ft — so you can choose the size that best fits your locking needs. The shorter length is convenient for daily carry, while longer versions allow locking multiple bikes or wrapping around larger objects.
Usage and versatility: The chain’s flexibility makes it easy to loop through wheels, frames and fixed objects like posts, racks, gates or trees. It’s suitable for bicycles, scooters, some motorcycles and other items such as grills, ladders or outdoor equipment.
Lock head and clearance note: The lock head diameter is about 1.25 in (3.2 cm). This fits most wheel gaps available on standard bikes, but it won’t pass through smaller wheel openings found on some scooters or compact e-bikes. If clearance is too tight, wrap the chain around the frame or another anchor point instead of threading through the wheel.
Safety reminder: While the materials and design increase resistance to casual attacks, no lock is foolproof. Avoid leaving a bike unattended in high-crime areas for long periods and use additional security measures if you need maximum protection.
Pros
- Resettable 5-digit code for keyless convenience
- Hardened 0.24" alloy steel chain resists cutting
- Polypropylene sleeve protects paint and improves handling
Cons
- Heavier than lightweight cable locks
- Lock-head diameter may not fit very small wheel gaps
- Not impervious to determined, well-equipped thieves
VerdictA robust, keyless chain lock that balances portability and deterrence. The 5-digit resettable mechanism offers more combinations than typical 4-digit models, the alloy-steel links resist cutting and the fabric sleeve guards your frame. Good for everyday security where moderate weight is acceptable; not intended to make a bike impervious to determined thieves.
Reviews
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Yvonne 5/5
Excellent pick for an e-scooter
Chose the red model for our son’s scooter. It feels durable, the code is easy to set, and it works exactly as intended. Highly recommend.
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Jonny Easling 5/5
Kid-friendly and reliable
We bought these for our kids’ bikes and scooters. The 5-digit code is easy to program and there’s no key to lose. Sturdy feel and the kids can lock up on their own.
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Greg 5/5
Well built
Feels solid and heavier than expected, which I like. Good overall quality.
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Family Man 5/5
Highly recommended — solid deterrent
Bought as a gift and it’s been used daily. Not unbreakable, but the strong alloy links and 5-digit code make it a real deterrent. Easy to wrap around almost anything and much tougher than cheaper locks.
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Meagan 5/5
Great lock for my scooter
Has kept my scooter safe so far. Sturdy chain, long enough for most posts, and light enough to carry. Setting the code was straightforward and the locking action is smooth.
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Margarita Gonzalez 5/5
I recommend it
Arrived on time and seems to be good quality. I recommend it.
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Tanya A. 5/5
Good value and simple to use
The 5-digit code gives extra confidence over 4-digit locks. The chain feels heavy-duty and the fabric sleeve stops scratches. Long enough for racks and poles—no key to worry about.
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Filipe Vilaca 5/5
Does the job
Simple and effective. Locks my bike up without fuss.
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Tori V 4/5
Solid quality for storage use
Bought for a bike kept in storage. Feels well-made and gives peace of mind against tampering. A bit bulky to carry daily, but perfect for stationary security.
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Rational thinker. 1/5
Videos raised doubts for me
Saw footage in other reviews showing quick abuse of the lock — someone twisting it off an e-bike. After that I hesitate to rely on it for unattended parking.
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Miss T.V. 5/5
Really good lock
Sturdy construction and an easy combination. Gives me confidence that my bike won’t be grabbed quickly.
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Pierre CHARLES 5/5
Solid and effective
Seems sturdy and does its job. Acts as a good deterrent and I like not having to carry a key.
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André H. 5/5
Good product — choose length carefully
Works well, but make sure you pick the right chain length for your needs.
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