30.9 seatpost shim clearance

Product Name: 30.9 seatpost shim clearance
Thinvik Bike Seat Post Shim 22.2mm, 25.4mm, 27.2mm to 25.4mm,27.2mm,28.6mm,30.4mm,30.8mm,31.6mm Bicycle Seatpost Tube Adap... clearance, GANOPPER 100mm Long Seatpot Shim 22.2 25.4 26.6 27.2 to 28.6 30 30.4 30.9 31.6 31.8 33.9 34.9 36 Alloy Bicycle Seat Post T... clearance, BNVB Alloy Bike Seatpost Shim, 100mm Length Aluminum Bicycle Reducing Sleeve Seat Post Tube Adapter, Diameter Switch 25.4-... clearance, Thinvik Bike Seat Post Shim 22.2mm, 25.4mm, 27.2mm to 25.4mm,27.2mm,28.6mm,30.4mm,30.8mm,31.6mm Bicycle Seatpost Tube Adap... clearance, Cogster Alloy Bike Seatpost Reducer Shim, 100mm Length Aluminum Bicycle Reducing Sleeve Seat Post Tube Adapter for MTB,Mou... clearance.