Your go to mountain bike tire for loose rocky rough trails wet or dry the bontrager xr4 team issue 275650b tubeless ready mountain bike tyre is designed to out corner any xc tire on the market with aggressive tread design deep lateral cupped blocks long shoulder blocks and buttressed tread block edges inner strength protection plus tubeless ready for fewer flats lower pressure capability the xr4 is tubeless ready and all you need to turn them to tubeless is a tubeless ready w