GERDA CONTRA COMBO 900/8x8C Bicycle Chain Lock Five-Digit Code Black 90cm

Product Overview

The GERDA CONTRA COMBO 900/8x8C is a combination chain lock for bicycles, designed for everyday use in urban environments by cyclists seeking moderate security. Built from 8 mm square-section steel links and featuring a protective textile sleeve, the chain measures 90 cm in length, allowing secure locking to bike racks, railings, or other fixed objects. Classified as "Extra Protection" by Gerda, it addresses common risk scenarios for middle-value bicycles left in areas with average security.

What distinguishes this lock is its five-digit individually settable code mechanism, which eliminates the need for keys on site and minimizes the risk of loss or unauthorized duplication common with key-based systems. This feature simplifies fleet management and user convenience for bike-sharing operators, rental companies, or businesses issuing multiple locks to employees, making it particularly well-suited for bulk procurement in urban mobility or tourist rental operations.

Key Features

• 8 mm square-section steel links ? resists cutting and sawing attacks


• Five-digit code lock ? higher security versus common three- or four-digit models


• Individually resettable code ? simplifies assignment to multiple users or rotating access


• 90 cm chain length ? suitable for securing frame and rear wheel to fixed infrastructure


• Textile sleeve ? prevents scratching and abrasion to bicycle paintwork


• Gerda Class: Extra Protection ? qualified for use on mid-value bicycles in moderate-risk areas


• No-key operation ? ideal for fleet/shared usage reducing administrative overhead

Technical Specifications

• Chain Link Diameter: 8 mm


• Chain Length: 900 mm


• Lock Type: Five-digit combination


• Protection Class: Gerda Extra Protection


• Chain Shape: Square-section steel


• Sleeve Material: Textile cover


• Color: Black

Applications

Designed for securing bicycles in urban, residential, or institutional environments where mid-level security is required. Recommended for bike-sharing fleets, employee commuter programs, tourist and hotel rental bikes, or personal use on medium-value cycles. Suitable for use on bike racks, lamp posts, railings, and other immovable objects, especially in moderately secure public or semi-public spaces.

Packaging & Shipping

Standard export packaging. Each unit includes the chain lock with textile sleeve and instructions on setting the combination code. Bulk ordering options available for fleet or rental operators.