The Ritchey Comp Road Fork is constructed of carbon and features an aluminum steerer.Features-Aluminum steerer extends into the crown for added strength-Aluminum dropouts-Crown is sized for standard headsetsItem Specifications-Steerer Type:Straight-Color:Carbon-Brake Mount (Fork):Short Reach Caliper (39mm - 49mm)-Crown Race:30-Weight:540-Wheel Size:700c-Offset:43-Material:Carbon-Defined Color:Black-Maximum Tire Clearance (Fork):25-Axle to Crown Length:368-Front Axle:9mm x 100mm-S.H.I.S. Stem Clamp Diameter:28.6-Steerer Tube Length (mm):300