From the first pedal stroke, the low weight and instant response of Enve's XC Carbon Rims will impress you. But, they're way more than just light and quick. These hoops are seriously stiff and strong, too. Enve achieves this feat by molding in the spoke holes so there's no drilling to weaken the carbon. They also tuned the rim sidewalls to be very impact resistant and durable. So descend as fast as you dare without fear, then point your bike back uphill and enjoy spinning away from everyone trying to hang with your amazing wheels!