Bicycle chain lock DUNLOP model 416984, length 120 cm, keyed lock

The DUNLOP bicycle chain lock model 416984 is a 120 cm keyed chain designed to secure bicycles in urban and campus environments. Constructed for everyday use, the chain is intended to be looped through the bicycle frame and wheel to provide a simple, portable anti-theft solution for commuter and city bikes. The keyed mechanism gives controlled access while the chain length accommodates a variety of locking points such as railings, fixed posts, and bike racks.

Advantages

This chain lock combines a long coverage length with a keyed locking system to deliver practical security for routine stops and short-term parking. The 120 cm length increases flexibility when securing the bike to fixed objects and allows both frame and wheel to be restrained. The keyed lock offers straightforward operation and repeatable access without the need to remember a code. Its design supports portable transport on the bike or in a bag.

Suitable for

• Commuter bicycles and city bikes for daily parking
• Students and campus use during classes or breaks
• Short-term stops at shops, cafes or public transport hubs
• Securing bikes in shared storage areas or bike racks

Key specifications

• Chain length: 120 cm
• Lock type: keyed mechanism
• Intended use: bicycle security for urban and commuter environments
• Portability: suitable for carrying on-bike or in a bag

How to use

Thread the chain through the bicycle frame and at least one wheel, then loop it around a permanent anchor point such as a railing, post or bike rack. Insert the chain end into the keyed lock and turn the key to engage the locking mechanism. Keep a spare key in a separate location if possible. When returning to the bike, insert the key and turn to retract the locking bolt before removing the chain. Store the chain on the bike or in a bag when not in use to maintain portability.

Usage recommendations

For improved security, pass the chain through the frame and rear wheel rather than only through the wheel. Choose a fixed anchoring point that cannot be easily removed or cut, and when leaving the bike for extended periods consider using an additional security device. Regularly inspect the lock cylinder and chain for signs of wear or damage and replace the lock if any deformation or malfunction is observed.