Compact in size, serious in protection. The Trelock U5 Mini Flex combines a hardened 15 mm steel shackle with an additional Loop cable, giving you flexible and reliable security for your bike in everyday urban use.
The Trelock U5 Mini Flex ZB 401 is designed for riders who want strong, dependable protection in a compact format. Perfect for city commutes, quick stops at the café, or daily parking at work or university.
The 15 mm hardened steel shackle provides solid resistance against cutting and leverage attacks, while the drill-protected cylinder adds another layer of security. Rated 15/18 on the Trelock security scale, this U-lock offers a high level of protection for city bikes, trekking bikes, MTBs, and e-bikes.
What makes the Mini Flex version stand out is the included Loop cable. It allows you to secure not only the frame, but also the front wheel or additional components – increasing versatility without carrying a second lock.
A sliding dust cover protects the locking mechanism from dirt and moisture, ensuring long-term reliability. The rubber coating on the shackle prevents scratches on your bike frame, keeping your paintwork safe.
The ZB 401 mounting bracket is included, allowing you to transport the lock conveniently on your bike frame.
Reliable, practical, and ready for daily use – this is security you can trust.
Technical specification
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Type: Bicycle U-Lock with additional Loop cable
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Model: U5 Mini Flex ZB 401
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Brand: Trelock
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Colour: Black
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Internal dimensions: 83 x 178 mm
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Shackle diameter: 15 mm
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Material: Hardened steel
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Cylinder: Drill-protected
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Security level (Trelock scale): 15/18
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Additional cable: Yes – Loop cable included
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Lock cover: Sliding cover to protect against dirt and moisture
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Frame protection: Rubber-coated shackle to prevent scratches
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Keys included: Yes
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Key replacement: Possible via Trelock official website
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Mounting bracket: Yes – ZB 401 included
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Weight: 1540 g
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Intended use: Securing city, trekking, MTB and electric bikes during urban parking
Shipping:
We ship within Poland, across the entire European Union, and worldwide