27.0mm centre fork crown.
40mm ALLOY BIKE SHIM SLEEVE CONVERTS 25.4mm up to 28.6mm (1” up to 1 1/8”) AHEAD HANDLEBAR STEM REDUCER ADAPTOR USES INCLUDE FITTING A 1 1/8” AHEAD STEM TO A THREADLESS FORK
Aluminium Alloy Steerer Tube Adapter Headset Reducer for Tapered to Straight Fork Conversion 1.5 Inch to 1-1/8 Inch Bicycle Parts(C)
Headtube Reducer Adapter For Tapered Fork Bikes Maintains Proper Bearing Preload And Alignment In 1 1/8 To 1 1/4 Inch Conversion(C)
Elchuiaby Tapered Fork Headtube Reducer for Road MTB Bikes Compatible with 1-1/8 inch to 1-1/4 inch Headset Interface Requirements (D)
Bike Headset Base Ring Reducer for Tapered Forks Aluminum Alloy Headtube Adapter 1-1/8 inch to 1-1/2 inch (C)
Tapered Fork Headtube Reducer Adapter Ring for Bike Headset Conversion from 1-1/8 inch to 1-1/2 inch Steerer Tube (C)
