U-lock bike lock ONGUARD 115x230 mm Neon blue (model 8153BU)

The ONGUARD U-lock model 8153BU in neon blue is a compact bicycle security device with a 115 x 230 mm shackle designed to secure a bike frame and wheel to fixed objects. The lock features a U-shaped hardened steel shackle and a detachable lock body to make locking and carrying convenient for everyday urban use. Its dimensions and construction are intended to provide basic to moderate theft deterrence for commuters and city riders who need a portable, easy-to-use solution.

Advantages

The hardened U-shaped shackle offers resistance to cutting and leverage attempts compared with lightweight cable locks, while the detachable lock body allows for compact storage and easy transport. The neon blue finish improves visibility when parked in dim environments, and the lock’s size makes it suitable for securing the frame and one wheel to rails, posts or dedicated bike racks. The mechanism is designed for frequent daily use and straightforward operation.

Suitable for

• Commuters securing a bicycle during short stops in urban areas
• City riders locking a frame and one wheel to public racks or posts
• Students or workers who need a compact, easy-to-carry lock
• Parents or guardians securing kids’ ride-on bikes for short periods

Key specifications

• Shackle size: 115 x 230 mm
• Shackle shape: U-shaped hardened steel
• Finish: neon blue
• Lock body: detachable design for compact transport
• Intended use: securing frame and one wheel to fixed objects

How to use

Position the shackle around the bicycle frame and a fixed object such as a rack or post, ensuring the frame and at least one wheel are enclosed. Insert the shackle into the lock body and rotate or press according to the lock’s mechanism until it clicks or indicates it is secured. Remove the key if applicable and stow the detachable lock body in a bag or mount. To unlock, insert and turn the key or operate the release mechanism, detach the shackle and remove the bicycle from the fixed object.

Usage recommendations

For best results, use the lock in well-lit, visible locations and secure the frame and rear wheel when possible. Combine with an auxiliary cable or secondary lock for additional security on longer stops or in higher-risk areas. Regularly inspect the shackle and locking mechanism for signs of wear or damage and lubricate the lock cylinder occasionally with a suitable lubricant to maintain smooth operation.