Cane Creek 40-Series Integrated Short Cover Complete for 42mm Head-Tube (1-1/8-Inch Straight Steerer), Black 6061 T-6 Aluminum Internally Contoured Cups Minimize Weight Innovative Clip-Seal Seals the Top Assembly and Captures the Compression Ring Durable Steel Crown Race with Low-Friction Face-Seals Internal Parts Are Cross-Compatible Across 10, 40 and 110 series