The shimano rs610 tubeless compatible 8 11 speed 700c rear road wheel is part of the road sport series which uses the race proven dura ace wheels technology but at economical prices making them suitable for everyday riding or use at local races the rims have a wear indicator which allows you to check when your rims become worn out the hubs use angular contact bearings and the hub shell features wide flanges maximizing rigidity and power transmission available in 20h black only