Gerda CONTRA SOLID 900/8,3 Bicycle Chain Lock 90cm W-Type Key Heavy Duty Blue

Product Overview

The Gerda CONTRA SOLID 900/8,3W heavy-duty chain lock offers robust security for high-value bicycles and scooters in urban and residential environments. Featuring a 90 cm length and 8.3 mm hardened steel links with a square profile, the chain is enclosed in a textile sleeve to prevent scratching and damage to the vehicle's frame. The lock body utilizes a round shape and includes an automatic dust cover to protect the key entry from environmental contamination.

This SKU's key differentiator is the symmetric W-type key, which allows reliable operation in any position, especially improving usability in low-light or awkward conditions. This eliminates the risk of failed locking and user frustration during nighttime use, making it suitable for fleet operators, shared mobility deployments, and retailers targeting cities with significant commuter cycling traffic.

Key Features

• 8.3 mm hardened steel links ? high resistance to bolt cutters and sawing attempts


• Square chain profile ? increases attack resistance compared to round links


• 90 cm usable length ? suitable for securing frame and wheel to stationary objects


• Textile protective sleeve ? prevents scratching of bike paint or scooter finish


• Symmetric W-type key ? eases operation in darkness and any key position


• Automatic dust cover ? keyhole shielded against dirt and water ingress


• Plastic-coated lock body ? prevents accidental impacts and frame marking

Technical Specifications

• Chain Link Diameter: 8.3 mm


• Chain Length: 900 mm


• Chain Profile: Square


• Protective Sleeve: Textile


• Key Type: Symmetric W-type


• Lock Body Shape: Round


• Gerda Class: Premium Protection

Applications

Designed for securing high-value bicycles and scooters in urban settings, residential facilities, shared mobility fleets, and secure public locations. Intended for longer-period locking in relatively safe areas, attached to fixed urban infrastructure such as posts, railings, or racks. Suited for retail and fleet procurement where robust, user-friendly bike protection is required.

Packaging & Shipping

Standard export packaging. Unit includes chain, plastic-coated lock body, textile sleeve, and one symmetric W-type key.