ENVE Composites AR Disc Fork - 12 x 100mm Axle 1-1/4" Tapered Steerer Flat-Mount Disc Carbon BLKENVE Composites AR Disc Fork 12 x 100mm Axle 1 1 4" Tapered Steerer Flat Mount Disc Carbon Black. The ENVE Composites AR Disc Fork is a purpose built road fork for gravel or otherwise rough roads where ample tire clearance is the name of the game and nasty weather is a given. Every ENVE fork is 100% molded carbon fiber from steerer to dropout TECH SPECS Steerer Type Tapered Color Black Brake Mount (Fork) Flat Mount 140 Crown Race 33 Weight 450 Wheel