Quick-Cog Assembly

Introducing The Quick-Cog, a high-performance, quick change, modular cog system for single speeds. Two-piece design allows the cog to be replaced without disassembling the hub cassette making it fast and easy to change gearing. Only a small screwdriver, knife, or just a fingernail is needed to remove the spiral retaining ring.

• Only 52 grams! (18T cog with driver assembly)
• Heat-treated aircraft grade stainless-steel cog
• 7075 aluminum driver with hard anodized finish
• Available with 18, 19, 20, 21, 22, 23, 24, 25 tooth cogs

2-piece Driver and Cog

The two-piece system consists of the driver and the cog. The mating interface features a precision machined custom involute spline which transfers torque over a large surface area for maximum strength and durability. A significant weight savings is achieved by combining the wide aluminum driver mated to a high-strength stainless steel cog.

Aluminum Cog Driver

The cog driver has a extra wide base where it makes contact with the cassette spline. This spreads the load over a wide area of engagement which prevents damage to the cassette compared to thin one-piece cogs. The lightweight driver is precision machined from aircraft grade 7075 aluminum and hard anodized to military specifications for long lasting surface protection.

High-strength SS Cog

The cog is made from a proprietary high-strength aircraft grade stainless-steel. We worked closely with a aerospace heat-treating company to develop precise heat-treatment procedures. The result is a virtually indestructible cog with a exceptionally durable surface that resists wear in extreme operating conditions.

Specially Developed Tooth Profile

We created our own custom tooth profile which allows the chain rollers to transition from tooth to tooth with the lowest amount of friction while maintaining uniform contact reducing chain wear. The tooth has the tallest shape you will find on any cog, this keeps the chain tracking straight and prevents chain skipping even when running a fairly loose chain.

Quick-Cog System

Our modular Quick-Cog system consists of one stainless steel cog, one aluminum cog driver, and two stainless steel spiral retaining rings. Order parts separately below.