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Oct 2, 2025

Ratio Technology joins the modular rear derailleur game

Ratio Technology joins the modular rear derailleur game

UK-based Ratio Technology, best known for its shifter conversion kits, has announced its own mechanical rear derailleur. Named “The Mech”, this cable-operated derailleur has a modular design that can be paired with 10-13 speed cassettes in a 1x configuration.

The derailleur, not yet in production, will have two different cage length options (for 46T and 52T maximum sprocket sizes), and the ability to be mounted to a traditional derailleur hanger or directly to a UDH frame (not unlike SRAM’s T90 mechanical derailleur). It will have replaceable cable fins to make it compatible with a range of popular dropbar and mountain bike shifters.

Ratio Technology joins the likes of Madrone in aiming to offer a modular and rebuildable mechanical derailleur that frees up restrictions of shifter compatibility and speed counts.

Pricing and availability are still to be confirmed.