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.
Cnc Machined Bike Chainring Adapter Plate For 9-speed To 1-speed Conversion On Mtb, 75mm Diameter In Pink(Purple)
28.6 to 25.4 mm Aluminum Stem Shim for Handlebar Diameter Conversion Bicycle
Bicycle Bottom Bracket Shim Adapter for SRAM 24 to 19mm Diameter Conversion
Bike Chain Front Derailleur Conversion Mount For 34.9mm Diameter Seatpost(Purple)
Bike Chain Front Derailleur Conversion Mount For 34.9mm Diameter Seatpost(Black)
Bike Chain Front Derailleur Conversion Mount For 34.9mm Diameter Seatpost(Blue)
