The Hope Hoops Pro 2 Evo 27.5in Wheel is the latest addition to the ever popular Pro 2 Hub range, with the 650b wheelset you also gain all the new features the Pro 2 Evo has to offer which includes the stainless steel bearings all the way through resulting in a smooth and more reliable ride, this feature in particular makes the Pro 2 Evo Wheel excellent value & highly enjoyable when tackling that difficult terrain! Hope Hoops Pro 2 Evo 27.5in Wheel Specification Stans Arch 650b rims Stainless Cartridge bearings 2014 T6 Aluminium Hub 32 Holes Aluminium Cassette body 4 pawl Ratchet type 2mm brass nipples Sapim Race Spokes Front: 860g Rear: 982g