U-lock MASTER LOCK 11cm wide hardened steel with 21cm shackle

This MASTER LOCK U-lock is constructed from hardened steel and designed to provide reliable security for bicycles and similar personal transport devices. Its 110 mm lock body width and 210 mm shackle length allow it to secure the frame and one wheel to a fixed object. The black finish provides additional surface protection against wear and weather while maintaining a compact form factor suitable for daily urban use.

Advantages

The hardened steel construction increases resistance to cutting and prying, while the U-lock shape distributes force to reduce leverage attacks. The compact 110 mm width paired with a 210 mm shackle length strikes a balance between portability and the ability to lock a frame and wheel. The coated surface helps prevent scratches to paintwork and improves corrosion resistance, extending the useful life of the lock under regular outdoor conditions.

Suitable for

• Securing bicycles in urban environments
• Locking frames and a single wheel to a fixed post or rack
• Use with scooters and e-bikes where a compact, strong lock is required
• Short-term parking in public spaces and commuting

Key specifications

• Lock type: U-lock with rigid shackle
• Body width: 110 mm
• Shackle length: 210 mm
• Material: hardened steel
• Finish: black protective coating
• Design: compact, single-lock mechanism

How to use

Position the lock so the shackle passes through the bicycle frame and, where possible, through a wheel and around a fixed object such as a bike rack or lamp post. Close the shackle into the lock body until it clicks and confirm the locking mechanism is fully engaged. Keep the key in a secure place and avoid forcing the lock open. For transport, attach the lock to a frame-mounted bracket or store it in a bag to maintain portability.

Usage recommendations

For maximum effectiveness, use the U-lock in combination with an additional cable or chain to secure both wheels and the seat when leaving the bicycle unattended for extended periods. Always lock the frame to an immovable object and choose well-lit, visible locations when possible.