Gerda CHAIN 1200/10 Security Chain Square Links Black Hardened Steel Combination Lock

Product Overview

The Gerda Ultra Combo 245/153C U-lock is a security device for bicycles, featuring a hardened steel shackle with a 14 mm diameter and a PVC protective cover. Widely used by cyclists for securing high-value bikes in urban environments, particularly in locations with elevated theft risk, it is classified as Gerda Premium Protection and includes a transport mounting bracket for convenient carriage.

What distinguishes this SKU is its 4-digit combination lock mechanism, allowing individual code setting and eliminating the risk of lost keys for fleet operations or rental fleets. Both-sided shackle locking further increases security against leverage attacks. This model is notably well-suited for bike rental companies, OEM equipment suppliers, and organizations requiring keyless locking solutions for frequent, shared bicycle use.

Key Features

• 14 mm hardened steel shackle ? resists cutting and leverage attacks


• Both-sided locking ? improved security versus single-sided mechanisms


• 4-digit combination lock ? user-configurable code, keyless operation


• PVC cover ? prevents scratches to bicycle frame and components


• Transport bracket ? facilitates easy bike-mounted carrying


• Gerda Premium Protection class ? recommended for expensive bicycles


• Weather-resistant design ? suitable for long-term outdoor installation

Technical Specifications

• Shackle Diameter: 14 mm


• Lock Type: 4-digit user-settable combination


• Shackle Material: Hardened steel


• Cover Material: PVC


• Gerda Class: Premium Protection


• Color: Black


• Bracket Included: Yes

Applications

Used for securing bicycles in urban environments, public spaces, and high-risk areas such as city streets, commuter stations, and school campuses. Recommended for higher-value bikes, bike rental fleets, and shared-use bicycles. Suitable for OEM procurement and bulk outfitting of commercial bicycle parking systems, thanks to combination lock functionality and keyless convenience.

Packaging & Shipping

Standard export packaging. Each unit individually boxed and includes U-lock body, PVC protective cover, transport bracket, and user manual with combination setting instructions.