U-lock ONG-5801 by ONGUARD — 13 mm hardened shackle, includes 2 keys

ONGUARD U-lock ONG-5801 features a 13 mm hardened steel shackle and includes two keys. Designed for securing bicycles, scooters and similar personal transport, the compact U-lock balances portability with solid resistance to common cutting and levering attacks. Its simple locking mechanism and included keys make it suitable for everyday use and short-term parking in urban environments.

Advantages

The 13 mm hardened shackle provides increased cut resistance compared with thinner locks while keeping overall weight manageable for carrying on a frame or in a bag. The lock’s shape and dimensions create a secure loop around a frame and a fixed object, reducing leverage points. Including two keys allows one to be stored separately for backup. The straightforward cylinder and shackle mechanism enable fast engagement and release without complex operations.

Suitable for

• Securing bicycles for short- to medium-term parking in urban areas
• Locking scooters and e-scooters during quick stops
• Protecting small motorcycles, frames or accessories when combined with a secondary lock
• Use where a compact, transportable lock with moderate theft resistance is required

Key specifications

• Shackle thickness: 13 mm hardened steel
• Lock type: U-lock / D-lock with removable shackle
• Included items: two keys
• Typical use: bicycle and scooter security for everyday and short-term parking
• Finish: corrosion-resistant coating on shackle and body
• Operation: manual key cylinder

How to use

Position the U-lock so the shackle passes through the bicycle frame and around a fixed, immovable object such as a bike rack or sturdy post. Push the shackle into the lock body until it clicks and verify the cylinder engages. Remove the key and store one key separately or on your person as a backup. For best fit, orient the lock to minimize empty space within the shackle loop, bringing frame and wheel elements close together to reduce leverage opportunities for cutters.

Usage recommendations

For improved security, use the ONG-5801 together with a secondary cable or chain to immobilize the front wheel or accessories. Always choose a well-lit, visible parking location and loop the lock through solid parts of the frame rather than removable components. Regularly apply lubricant to the key cylinder and keep spare key stored in a safe location.