UN bicycle chain lock CONRA 900/6C — round body, single-piece chain

UN bicycle chain lock CONRA 900/6C is a round-body, single-piece chain designed to secure bicycles, scooters and other outdoor equipment. The construction combines a cylindrical lock housing with a continuous chain to allow flexible routing around frames and fixed objects. Intended for everyday use, it offers portable security for short- to medium-term protection when parked in public or private spaces.

Advantages

The round lock body provides compact protection for the cylinder mechanism while the single-piece chain eliminates weak joints, increasing resistance to twisting and leverage attacks. The continuous chain construction improves flexibility for locking different frame geometries and fixed anchors. The design is suitable for routine daily use and for users who need a balance between portability and dependable deterrence.

Suitable for

• Securing bicycles in urban or residential environments
• Locking scooters and children’s ride-on toys to fixed points
• Short- to medium-term outdoor parking of bikes
• Use with bike racks, posts, railings and other fixed anchors

Key specifications

• Lock type: round (cylindrical) body with integrated cylinder
• Chain: single-piece continuous chain construction for improved strength
• Usage: portable chain lock for everyday short- to medium-term security
• Compatibility: suitable for frames, scooters and other small outdoor equipment

How to use

Thread the chain through the bicycle frame and around a fixed anchor such as a post or railing, then insert the free end into the round lock body and turn the key or operate the locking mechanism as indicated. Ensure the chain passes through the frame (and wheel if desired) to reduce leverage points and position the lock body away from the ground to make tampering more difficult. When not in use, carry the lock in a bag or use a mounting bracket if available.

Usage recommendations

For improved security, choose well-lit and visible parking spots and combine the chain lock with additional security measures such as a secondary cable or U-lock for high-theft areas. Regularly inspect the chain and lock mechanism for wear, debris or corrosion and lubricate the cylinder periodically to maintain smooth operation.