SunRace M9 9 Speed 11-40t Silver Cassette brand_avid TRETS is also ideal for

TRETS is also ideal for children with neuromuscular disorders

Note:  This product only includes the complete double-sided mount

IMPORTANT NOTE: At this time it is not recommended that these trainers be used with cycles outfitted with Enviolo hubs

Also works on RANS standard seats and Easy Racer seats

Rim Model: WEI ZAC19

SunRace M9 9 Speed 11-40t Silver Cassette brand_avid TRETS is also ideal forM9 Cassettes offer a wide range ratio for 9 speed MTB sytems. Specifications: Nickel Finish Steel spider Color: Silver Cassette Body Type: Shimano SRAM 8, 9, 10 Speed Drivetrain Speeds: 9 Cassette Cogs: 11 13 15 18 21 24 28 34 40 Range: 11 40 teeth