SRAM Rear Axle - X0 Hubs / Rise 60 B1 / Roam 30 / Roam 40 / Rail 40 / Rise XX / Roam 50/60 B1 Straight Front shifter is micro-friction design

Front shifter is micro-friction design

Additionally it allows the user to route wires/hoses internally when paired with compatible stem/headset combo or externally with any traditional stem and headset equipped bike

Bolt Mount Diameter 8 Frame Mount Width 15

"VV" type 2-lip non-contact Silicone labyrinth seals

SRAM Rear Axle - X0 Hubs / Rise 60 B1 / Roam 30 / Roam 40 / Rail 40 / Rise XX / Roam 50/60 B1 Straight Front shifter is micro-friction designSRAM Rear Axle X0 Hubs Rise 60 B1 Roam 30 Roam 40 Rail 40 Rise XX Roam 50 60 B1. Axle set includes axle and end caps. Does not convert a hub or wheel to a different axle diameter or length