TRELOCK protection - reliability and quality. Bicycle theft numbers are not falling, and only about one in ten stolen bikes is eventually returned to its owner. However, you can reduce the risk of theft by investing in a sufficiently secure lock. TRELOCK offers locks of various security levels to suit everyone's needs. The higher the security level, the harder the lock is for thieves to defeat. Innovative security and design solutions build trust in the TRELOCK brand. Modern lock core manufacturing technologies and high-quality materials provide greater security and lower weight. The TRELOCK U4 model offers a medium security level thanks to its hard-to-break parabolic shape and quality disc core, protected from dust by a cover. The lock has additional protection at its most vulnerable points, which thieves most often target. The 14 mm diameter lock shackle is made of special hardened steel, making it highly resistant to cutting, sawing, bending and impacts.
Technical specifications
- Security level (TRELOCK): 4 of 6
- IN-X lock core - a high-quality mechanism protecting against attempts to pick the lock by drilling, pulling or using special tools
- Two-way keys - no need to align the key direction
- Includes a mounting bracket for the frame
- Dust protection
- Made of hardened steel
- Option to order a new or additional key by code
- Length: 23 cm
- Shackle diameter: 14 mm
Product video (English subtitles):

