Race Face Era 29" WheelsCarbon rim engineered with the compliance of alloy and that lively feel of carbon Rear wheel's deeper rim profile is built to withstand full time enduro punishmen 30mm ID, 37. 2mm OD tubeless ready carbon rims with offset spoke hole layout Hub end caps are easily replaced to fit virtually any axle standard Oversized aluminum shell for optimal lateral and torsional stiffness 6 pawls with a 60 tooth drive ring for super fast engagement Large, wide