BikeHard Challenger Pro 700c Road Wheelset ShimanoBikeHard Challenger Pro Road Wheels are for any true race bike. Silky smooth spinning from precision sealed cartridge bearings. Super light at 1592 grams, nothing on the market compares at this price! Machined braking surface 30mm rims teamed with Sapim double butted spokes, creates an amazingly fast light wheelset!850228007721