Pro lite revo a21w centre lock road wheelsetthe revo a21w alloy road disc brake wheelset is a disc brake specific wheelset from pro lite, which features the 6 bolt hub mount for disc rotors and stylish low profile sleeved rims.stable and consistent braking responsethese wheels offer the perfect mix of low rotational mass, strength, and lightning fast acceleration. The pro lite revo wheels are perfect for winter training, even more so when the weather is bad and will offer exceptional performance for cyclo cross events where braking response time and consistency are crucial. These wheels offer reactive and high performing brake output straight away, also after long and fast winding descents and likewise at the end of a muddy off road session.exceptional all rounderthese hubs have been designed to be used with the 6 bolt disc rotor setup, which provides superb performance and easy maintenance. When this is combined with the strong rim and the sandvik aero bladed spokes, pro lite have created a wheelset that features the durability and performance to withstand terrain associated with cyclocross and bad weather. Yet when on the open road it rolls with perfect efficiency and stability, making it a truly exceptional all rounder.featuresrims  rim type sleeved alloy 6061, clincher tubeless ready  rim finish shot peened  rim depth 21mmspokes  spoke count front 28 rear 32  spokes aero bladed sandvik stainless steel   lacing 3 crossfront hub  bearings 2 japanese ezo  disc brake mount  6 bolt  axle width o.l.d. 100mm  skewer type qr or 15mm with adapters supplied  weight 756g w o skewerrear hub  bearings 4 japanese ezo  disc brake mount 6 bolt  freehub type shimano 9, 10, 11 speed  freehub switchable yes  freehub material alloy  axle width o.l.d. 135mm  skewer type qr or 12mm with adapters supplied  weight 888g w o skewerbuy pro lite wheels tyres from chain reaction cycles, the world's largest online bike store.