T11 REAR Shell fabricated from 6061 aluminum. Rear axle is 15mm cro-mo. Freehub body 6al4v titanium. Driver3 pawl/ 24 point engagment. Bearings: Shimano: three: 6902-2rs one: 3802W Campagnolo: two: 6902-2rs two: 3802W O.L.D.: 130mm Available colors polished silver, black, red, blue, green, gold, pink, or purple anodized. Spoke Hole Drilling: 20h, 24h, 28h, 32h, 36h