Box Four 8-Speed 11-42T Cassette Wheel Brand_Reynolds and our patented carbon composite

and our patented carbon composite outsole provides maximum power output

This OSPW System is also compatible with the 2020 11 speed SRAM Red eTap derailleur featuring a clutch

8mm Small W: 720mm | Medium & Large W: 740mm Stem 31

Cup material: Aluminum

Box Four 8-Speed 11-42T Cassette Wheel Brand_Reynolds and our patented carbon compositeEconomical wide range gearing for the masses Steel stamped cogs for improved durability and longevity Wide ratio with consistent progression Intended to be used with the Box Four 8sp drivetrain only may not be compatible with other 8sp components Range: 11 42t Gears: 8sp Cogs: 11 14 16 18 22 28 34 42 Color: Black