The EWS is strict—break certain parts and you DNF. The rule’s meant to encourage sensible management of equipment, but it’s also tipped the balance in favor of toughness and reliability. Enter the Reserve 30. Its 30mm internal width supports a 2.3-2.5” tire and the thick rim beads stand up to the abuse of tough, rocky, steep tracks ridden at elite speed. While DH rims see greater single impacts, nothing beats the full weekend of regular abuse that an EWS race dishes out. To say nothing of the infamous 'Anti-Grip' and the rocks buried within the moondust in the Andes of Chile. This wheel is compatible with Ebikes.