Trelock Bicycle U-lock U4 ZB 401 (102x230 mm), Black

When it comes to protecting your bike in the city, a U-lock is one of the most trusted solutions. The Trelock U4 102-230 combines strong materials, practical features, and proven security into a dependable daily companion.

The 14 mm hardened steel shackle provides strong resistance against cutting and leverage attacks. Inside, the cylinder is protected against drilling, adding another layer of defense where it matters most.

A sliding keyhole cover protects the locking mechanism from dirt, dust, and moisture – helping to maintain smooth operation throughout the year. With a security rating of 13/18 on the Trelock scale, this lock is well suited for securing bikes in urban environments such as city centers, workplaces, schools, and public parking areas.

A rubber coating on the shackle helps prevent scratches on your bike frame, while the included ZB 401 mounting bracket allows you to carry the lock conveniently on your bike. The set includes keys, and additional keys can be ordered via the official TRELOCK website if needed.

Reliable, practical, and built to last – the Trelock U4 is a smart choice for everyday riders who want real protection.

Technical specification

• Type: Bicycle U-lock

• Model: Trelock U4

• Internal dimensions: 102 x 230 mm

• Shackle diameter: 14 mm

• Material: Hardened steel

• Security level: 13/18 (Trelock scale)

• Cylinder protection: Drill-resistant cylinder

• Keyhole cover: Sliding cover to protect against dirt and moisture

• Protective coating: Rubber coating to prevent frame scratches

• Mounting bracket included: ZB 401

• Keys included: Yes

• Additional key option: Possible via TRELOCK website

• Colour: Black

• Weight: 1000 g

• Intended use: Securing city bikes, trekking bikes, MTB and other bicycles in public areas

Shipping:
We ship within Poland, across the entire European Union, and worldwide