Eunorau | Single Speed Cassette Conversion Kit Overview A compact conversion kit that turns a multi-gear cassette hub into a reliable single-speed drive. Designed for Eunorau fat and off-road e-bikes, it simplifies the drivetrain for hunting, trail riding, or low-maintenance use. Benefits Makes your bike easier to maintain — fewer parts to clean, adjust, or replace. Improves reliability in mud, snow, and rough terrain by removing the derailleur and multiple sprockets. Quieter, smoother drivetrain for a less distracting ride. Quick to install so you can switch to single-speed when you need it and go back later if desired. Allows you to set a consistent, purpose-built gear for hunting or off-road performance. Features Converts most multi-geared Eunorau e-bikes to a single-speed drivetrain. Includes a 32T single-speed cog for a stable gear choice. Comes with four spacers to adjust chainline and achieve proper alignment. Includes a single-speed chain guide to keep chain retention reliable. Compatible with hubs that previously ran 8, 9, 10, 11, or 12-speed cassettes. Quiet, simple, and smooth operation once installed. Compatible Eunorau models: Specter-S Defender-S FAT-HS Fat-HD Fat-HD1.0 Pro Fat-HD2.0 Specifications Brand: Eunorau Type: Single-Speed Conversion Kit Speeds: Single speed (converts 8–12 speed cassette hubs) Color: Black Included spacers: 21 mm, 7 mm, 4 mm, 2 mm Included parts: Chain guide, 32T cog, 21 mm spacer, 7 mm spacer, 4 mm spacer, 2 mm spacer Applicable cassette sizes: for hubs originally fitted with 8/9/10/11/12-speed cassettes Compatible models: Specter-S, Defender-S, FAT-HS, Fat-HD, Fat-HD1.0 Pro, Fat-HD2.0