The Cosmic Pro Carbon SL T was originally designed to meet the demands of professional teams who wanted a tubular carbon rim for the most difficult conditions, especially the famous cobblestones of Paris-Roubaix. We underwent intensive testing, testing an incredible number of prototypes until we reached the standards required by our athletes. Since then, the Cosmic Pro Carbon SL T has won Paris-Roubaix and countless other professional competitions and demanding amateurs. The carbon rims have a unique depth / width ratio. With a height of 40 mm and a width of 25 mm, they offer a perfect blend of aerodynamics, lightness, excellent support and tire resistance. The 3K carbon outer layer hides an extremely complex inner layer using several types of carbon fibers that are placed by hand for complete accuracy. These unique wheels attach to hubs with smooth, adjustable cartridge bearings (QRM +) and our fast, quick-action Instant Drive 360 freewheel system. Key features: 16 spokes on front wheel and 20 rear for increased lateral stiffness and optimal power transfer .25mm outer width for seamless tire integration and superior handling in all conditions. The flexible and durable QRMa bearings offer low friction and fast engagement. The braking track offers superior braking performance in dry or wet conditions. Patented elliptical spokes improve aerodynamics. Why buy at Evans Cycles? As cyclists ourselves, we know that you want to buy the latest cycling equipment for your bikes at the best price, so we offer you excellent service from the beginning of your trip with us.Click on collect: Buy online and collect easily in your store. Match Price: We offer a match price guarantee if one of our direct competitors is cheaper than us. This includes Cycle Surgery, Wiggle, Chain Reaction Cycles, Halfords, Tredz and Cycle Republic. 90 business days: If you change your mind, all items except food, videos, DVDs, face masks, RIDEIT events, and software may be returned to us. within 90 days, for any reason, provided it has not been used or mounted and returned in its original packaging with valid proof of purchase.