Most of the common front forks on the market are 28.6MM. Most stems also have 28.6MM installation specifications. However, there are very few 25.4MM front forks. In order to install 28.6MM style stems, a 25.4-28.6 conversion kit is required.
ComfyHarbor Handlebar Reducing Washer 31.8mm To 25.4mm 22.2mm, Anti-Slip Shock-Absorbing Thickened Plastic Spacer Gasket For For Bike Stem Bar Diameter Reduction, Black(31.8 turn 22.2mm)
,for Bike Computer Mount Spacer H,andlebar Stem Washer,for Ring 31.8 To 25.4 Reduction Gasket,for Edge Adapter Bushing Cycling GPS Holder Shim Front,fork Mount Conversion 4 Pack
For Bike Computer Mount Spacer Handlebar Stem Washer For Ring 31.8 To 25.4 Reduction Gasket For Edge Adapter Bushing Cycling GPS Holder Shim Front Fork Mount Conversion 4 Pack
For Bike Headset Conversion Adapter for Tapered Steerer Fork, Aluminium Alloy Crown For Ring Gasket, 30mm to 39.8mm Reduction Spacer for Road For Bike Repair(C)
10 Pcs Aluminum Bicycle Pedal Washers For Crank Arm Protection And Noise Reduction, Silver, 20mm Diameter(20pc)
Keenso Aluminium Alloy Bike Front Fork Conversion Adapter Spacer for 30mm Diameter Tube, with 45mm Outer Diameter
