A direct development from the Pro2 EVO hubs with stainless bearings throughout CNC 2014T6 aluminum shell construction with (5) stainless, sealed cartridge bearings 44 tooth ratchet mechanism gives a 10% quicker engagement over the Pro 2 EVO in a CNC 7075T6 aluminum body 6bolt/44mm-BCD International Standard disc mounting dimensions Front (FDS): 9x135mm QR front disc spacing, 15x135mm FDS, 15x142mm FDS and 15x150mm FDS, available separately Rear: 10x170mm QR, 10x190mm QR, 12x177mm thruaxle and 12x197mm thru-axle HG 811sp: Not compatible with HG 11sp road cassettes