Check the listing for details. FSA No.57 E2 Tapered Steerer Headset with Reducer Cown Race. Condition: New. Listed at 52.99 USD. FSA No.57 E2 Tapered Steerer Headset with Reducer Cown Race FSA No.57 E2 Tapered Steerer Headset with Reducer Cown RaceSteerer outer diameter: 28.6mm (1-1/8") / 38.1mm (1-1/2")Fits Straight 1-1/8" Fork Steerer Tube with included Reducer Crown Raceor Fits Tapered Fork Steerer Tube using your existing 1.5" crown race (1.5" crown race is not included)Crown race inner diameter: 28.6mmCup Insertion OD: Not applicableStack height: 7mmBearing type: SealedHeadset type upper: Unthreaded semi-integratedHeadset type lower: Semi-integratedIncludes Upper 1-1/8" and 1.5" Lower Bearings and all items shown in attached photo. For use as replacement headset for Trek Part # W299174FSA part # ZS44/28.6 | ZS56/30 Powered by Solid Commerce The All-in-One Listing, Inventory & Order Management Solution for Online MerchantseBay integration by