PLATT Bicycle Seatpost Shim Aluminum Alloy Bike Seat Post Tube Adapter(31.6 to 33.9)

MATERIAL:This Bike @@@HFajHDfyo+hQWuMaLCWRiHTnzOSXcNz+@@@post Shim is Made of High Quality Aluminum Alloy, it is Lightweight,Strong ,Durable and Great Anti-corrosion. SIZE: 31.6 to 33.9 ，Use this Bicycle Seatpost Shim,The 31.6 Seatpost can be converted into the 33.9 Seatpost. LEGHTH: 100mm , Our shims are made to 100mm length and are longer than other shims on the market, giving your seat post much better support inside the frame. TIP:Please Check or Measure the O.D of the Original Seatpost, OR Measure the I.D of the Bike Frame Seat Tube.Then make a Right Choice. APPLICATION:This Seatpost Shim can easily adjust the diameter of the bicycle seat post to fit a larger frame , eliminating the trouble of repurchasing the bike seatpost.