Lightweight and silky smooth 7075 alloy road racing hubs - a modern take on a timeless classic. Front has 2 sealed bearings, an alloy axle, and high flanges for a classic look Rolling around the 6Drive system, these hub features six independently sprung twin tipped pawls, offering a dependable and quiet engagement *Shimano/SRAM 810 (with spacer), Shimano/SRAM 11sp Road cassette compatible