Lightweight full carbon rim brings low inertia for instant acceleration and improved control. 21mm internal width maximises tire volume for improved confidence efficiency and cornering grip. 42mm rim profile and flat spokes are wind tunnel proven for low wind resistance and excellent lateral stability at high speed. Mavic UST tubeless ready improves comfort efficiency and tire installation. Rear wheels feature Mavic`s new Instant Drive 360 freewheel. High quality hubs with dual seal pre-load adjusted bearings