Bike Lock MAGNUM MGN-3108 — U-lock security device for bicycles

MAGNUM MGN-3108 is a compact U-lock designed to secure bicycles for everyday urban use, commuting and short-term outdoor parking. The device is built to provide point protection for frames and wheels by combining a hardened U-shaped shackle with a crossbar locking mechanism in a size and weight suited to riders who need a practical, transportable security solution.

Advantages

The U-lock construction offers concentrated resistance against levering and cutting tools compared with simple cable or chain solutions. Its compact form factor provides easier carrying and storage on the bike or in a bag, while the crossbar lock mechanism delivers direct engagement for consistent operation. Materials are selected to balance physical protection with reasonable weight for everyday use.

Suitable for

• Securing a bicycle during short-term stops in urban areas
• Commuting where a compact, easy-to-carry lock is required
• Locking a bike frame and one wheel to a fixed object
• Use by riders who prioritize a simple mechanical lock without electronics

Key specifications

• Type: U-lock (D-lock) designed for bicycle security
• Construction: hardened shackle with crossbar locking mechanism
• Intended protection: frame and wheel point protection
• Form factor: compact size suitable for transport on bike or in a bag
• Use case: everyday urban use, commuting, short-term outdoor parking

How to use

Place the shackle around the bicycle frame and, where possible, include one wheel and the fixed object (for example a bike rack or pole) before inserting the shackle into the crossbar lock. Ensure the lock sits snugly against the frame and the shackle is fully engaged in the locking mechanism. Turn the key to operate the lock and remove the key only after confirming the mechanism is fully closed. Store the key in a secure place and carry a spare if needed for daily use.

Usage recommendations

To maximize security, use the lock in combination with a secondary locking method when leaving a bike for extended periods or in higher-risk locations. Position the lock close to the frame to minimize leverage points, and avoid leaving the bicycle unattended in poorly lit or isolated areas. Regularly inspect the shackle and lock cylinder for signs of wear or tampering and lubricate the keyway periodically to maintain smooth operation.