The new MTB hubs are here. Just 392g per set for SRAM XX1 version, 401g for the Shimano compatible cassette body. The cassette body is user replaceable and changeable. It take just 30s to swap over. Both front and rear hubs are are also axle system convertible and are thus compatible with standard skewers, 142 12mm Syntace axle standard, and 15mm through axle.