Sportneer Bike Lock: 5 Digit Combination High Security Anti Theft Bike Chain Lock - 3.2/3.6/4ft Heavy Duty Keyless Bicycle Lock for Bike Motorcycle Scooter Door & Gate - Easy to Use, Bike Accessories

The Sportneer Bike Chain Lock provides keyless security for riders and equipment owners who want to secure gear without tracking a physical key. Built around a 5-digit numerical tumbler, this lock resolves the daily frustration of lost or forgotten keys while offering 100,000 possible dial combinations. It suits commuters, e-bike riders, scooter owners, and homeowners who need to anchor bikes or outdoor property to stationary posts, fences, or storage racks.

Physical strength centers on the 0.236-inch (6mm) manganese steel chain links, engineered to resist cutting and sawing attempts. Complementing the steel chain, the internal locking core uses a sturdy zinc alloy build that defends against tampering. To guard your equipment against cosmetic damage, Sportneer wraps the metal links in a flexible polypropylene fabric sleeve. This cover serves several practical purposes: it shields your hands when handling cold or hot metal, prevents rust across the steel chain, and keeps metal links from scuffing your bicycle paint.

Everyday convenience comes from the straightforward resetting mechanism and protective housing details. The lock arrives set to 00000, and changing the code requires rotating a dedicated reset dial 90 degrees while the wheels sit at the current unlock state. Once you enter your chosen five numbers, turn the dial back to lock in your custom combination. An integrated dustproof cap covers the lock hole, preventing road grime, sand, and rainwater from entering the locking mechanism and causing internal jams.

There are physical limitations to keep in mind before choosing this model. The locking head measures 1.3 inches in diameter, which may be too wide to pass through tight wheel spokes, narrow frame cutouts, or compact equipment handles. If the opening on your bicycle or scooter wheel is narrower than 1.3 inches, you must wrap the chain around your frame and wheel rather than feeding the head through the gap. Additionally, the listing does not mention any master override key or recovery method, meaning you must remember your five-digit code to open the lock.

Verdict: The Sportneer Bike Chain Lock is an excellent choice for bicycle, e-bike, and scooter owners who want reliable chain security with key-free dial convenience. It delivers solid manganese steel cut resistance and helpful frame protection for riders with ample clearance around their wheels and frames.

• Chain Material: 0.236-inch (6mm) manganese steel
• Lock Core Material: Zinc alloy
• Sleeve Material: Polypropylene fabric
• Lock Type: 5-digit resettable combination
• Possible Combinations: 100,000
• Lock Head Diameter: 1.3 inches
• Available Lengths: 3.2 ft, 3.6 ft, 4 ft
• Default Factory Code: 00000

A great fit if you:

• Want the convenience of a keyless locking system with 100,000 possible five-digit numerical combinations.
• Need a durable 6mm manganese steel chain to secure bicycles, electric bikes, scooters, or motorcycles.
• Worry about bare metal chains scratching your bicycle paint or feeling uncomfortable in hot and cold weather.
• Require a versatile utility lock to secure outdoor gates, ladders, lawnmowers, fences, or toolboxes around your property.
• Lock two bicycles together frequently using the flexible 3.2-foot or longer chain options.

Consider something else if you:

• Have wheel spoke gaps or equipment openings narrower than the 1.3-inch locking head diameter.
• Prefer using physical keys rather than memorizing and dialing a five-digit numerical combination code.

Confirm on the listing:

• Check which length option (3.2 ft, 3.6 ft, or 4 ft) fits the distance around your bicycle frame, wheels, and parking anchor.
• Measure the openings between your wheel spokes or equipment mounting points to ensure they accommodate the 1.3-inch head diameter.
• Confirm that your intended locking setup works by wrapping the chain around the frame if the head cannot thread through narrow gaps.
• Check whether the package includes single or multiple chain units if securing several items at once.

How to compare your options: Chain locks generally differ in link thickness, locking mechanism, and reach. This model uses 6mm manganese steel links paired with a 5-digit zinc alloy combination core, giving you keyless entry and cut resistance. When evaluating your needs, weigh the convenience of dialing a code against physical key locks, and ensure the chosen chain length spans all the equipment you intend to secure.

To set up your lock, start with the factory preset code of 00000. Align the dials, rotate the reset dial 90 degrees clockwise, turn the number wheels to your chosen personalized combination, and rotate the dial back to finalize your new code. Make sure to record or memorize this sequence immediately, as there is no key backup if the code is forgotten.

When securing your bicycle, keep the 1.3-inch lock head in mind. If your wheel spoke spacing is too narrow to pass the head through cleanly, wrap the length of the chain securely around the frame and rim before locking the head into place.

Keep the protective polypropylene sleeve pulled flat over the chain links to maintain scratch protection across your bike frame. After locking up outdoors, always close the built-in dustproof cap over the lock opening to keep out rainwater, sand, and grit.

How do I change the combination from the factory setting?
Keep the number wheels aligned to the unlock password (preset to 00000 out of the box), rotate the reset dial 90 degrees, align the wheels to your new personalized code, and turn the dial back.

What is the diameter of the locking head?
The bicycle lock head has a diameter of 1.3 inches. You should measure your wheel spokes or equipment pass-through gaps to confirm clearance before purchasing.

What should I do if the lock head does not fit through my wheel spokes?
If the 1.3-inch head cannot pass through the gap between your tires or spokes, wrap the chain around your bicycle frame and wheels instead of threading the head through the wheel opening.

What materials are used in the construction of this lock?
The chain links are made from 0.236-inch (6mm) manganese steel, the lock core is constructed from zinc alloy, and the outer protective sleeve is made from polypropylene fabric.

Does this lock include physical backup keys?
No, this model uses a keyless 5-digit combination design with 100,000 possible combinations and does not use physical keys.