Suggested Retail: $10.99. 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 Tube Adapter - This seatpost reducing sleeve shim is compatible with most bicycles including MTB, BMX, Fixed Gear bike, mountain bike, road bike, city bike and more. The shim allows you to easily adjust the diameter of the bicycle seat post, eliminating the need to repurchase a bike seatpost. Made of high-quality 6061 aluminum alloy, it features a CNC machining CD texture surface for durability and rust resistance. With this adapter, a 30.9 mm Seat Post can be converted to a 34.9 seatpost. Brand: GANOPPER Model: ‎GNPSM309349 -- LOT STICKER: TCE-BOX-BOXTCED0046-ITEM-6e57a06a___LPNRRIF8743653 GANOPPER Seatpost Shim 34.9 to 30.9 mm Bushing Bicycle Seat Post Adapter Tube Sleeve Adapter for Birdy 34.9mm Dropper Seatpost MTB Folding Bike -- SIZES ARE ESTIMATED. 7 CALENDAR DAY FULL REFUND GUARANTEE (FROM PRIMARY PICKUP DATE) ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE (FROM PRIMARY PICKUP DATE) IS ALSO AVAILABLE. THE PRIMARY PICKUP DATE IS THE DAY AFTER THE AUCTION ENDS. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.