Born to climb mountains. And win.No wheel is lighter or more agile, designed to confront the toughest ascents and power through every bend.The full carbon rim responds promptly to every pedal stroke and the hubs with CULTTM technology assure the maximum smoothness, unaltered over time. Available in clincher and tubular versions. Racing Light XLR clincher with Shimano Inc. FW body is compatible with 10 and 11 speed sprockets. The Racing Light XLR clincher wheel is entirely hand assembled by a specialised FulcrumR technician and is checked in every tiny detail with electronic instrumentation. This ensures maximum performance and reliability for all FulcrumR wheels.