ZTTO Single Speed Chain Tensioner / Derailleur

Alloy chain tensioner that converts a multi-speed bike into a single-speed setup, with a spring-loaded arm that takes up slack across a 13-23T cog range. Weighs approximately 63g and includes an adjustable chain line for fine-tuning tension and alignment. The current version adds a chain guide for extra stability. Suited to riders converting a geared MTB or road bike to single-speed or fixed-gear-style running.

Specifications