It took days of going through more than a thousand customer reviews and conducting expert researches to narrow down the list. Weve included a comparison table below to give you a quick summary of our top 10 seatpost shim. Its followed by an in-depth review of each seatpost shim. Hopefully, once you are done reading this article, you will be well informed about seatpost shim and be able to select the right seatpost shim for you without any hesitations.
Rank
Product Name
Score
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Best seatpost shim reviews
1. Cane Creek .ST27316 Seatpost Shim, 27.2 I.D. TO 31.6 O.D.
Feature
Convert any 27.2mm seatpost to a 28.6-31.6mm seatpostWorks with Cane Creek Thudbuster ST Seatpost (see item #50-2678) and Cane Creek Thudbuster LT Seatpost (see item #50-2677)
2. Origin8 Multi-Fit Seatpost Shim
Feature
Multi-FitAlloy
25.4 ID
3. Gio Seatpost 27.2 to 31.6mm Shim 100mm Length
Feature
27.2 Inner diameter, 31.6 outer diameter - will convert a 27.2 seat post to fit a 31.6 seat tubeLength: 100 Millimeters
Material : Alloy
Weight : 52 grams
Made in Taiwan
4. Gio Seatpost 27.2 to 30.9mm Shim 100mm Length
Feature
27.2 Inner diameter, 30.9 outer diameter - will convert a 27.2 seat post to fit a 30.9 seat tubeLength: 100 Millimeters
Material : Alloy
Weight : 44 grams
Made in Taiwan
5. Fouriers Bicycle Seat Tube Adapter Bike Seatpost Reducer Shim 27.2mm 30.9mm 31.6mm (31.6mm x30.9mm)
Feature
Material: AL6061-T6Spec: OD 31.6mm x ID 30.9mm OD 31.6mm x ID 27.2mm OD 30.9mm x ID 27.2mm
Color: black
Length:90mm
Weight: 9g-41g
6. Cane Creek Seatpost Shim, 31.6 to 34.9mm - AAE0008
Feature
3-7/8 tall machined aluminum, black anodized, laser etched with sizing info7. MUQZI Seat Post Adapter Shim, Mountain Bike Seat Post Tube Seat Post Reducing Sleeve Shim, Bicycle Seat Post Tube Adapter(25.4/27.2/31.6/30.8/30.4)
Feature
Material: Bike seat tube reducer sleeve is made of high quality aluminum alloy CNC machining Surface anodizing, strong and rustproof, lightweight and durableAdvantage: Full CNC precision machining, anti-slip. Use this seatpost sleeve adapter ring, you can change the bicycle seat tube to the size you want.
Tips: Please check your bike frame seat tube outside diameter. Measure the inside diameter of your old clamp. Or measure the outside diameter of your seat tube (on your bike frame). Then make a right choice.
Compatibility: Suitable for MTB, mountain bikes, road bikes, etc. Efficient and convenient, it is the best choice for your ride
Highlights: exquisite processing technology, simple and elegant, multi-size bicycle seatpost tube reducer sleeve easy to adjust the diameter, bring the convenience to your travel
8. Bnineteenteam Aluminum Alloy Bicycle Seatpost Tube Adapter (27.2 30.4mm)
Feature
PREMIUM QUALITY:The seatpost is made of full CNC precision machining aluminum alloy, anti-slip, light weight and can be used for a long time.6 DIFFERENT SIZE:Our product have 6 different seat post tube adapter, you can choose the bicycle seat tube to the size you want.
EASY TO INSTALL: Easy to install and remove, convenient for you to use.
WILD RANGE OF APPLICATION:This product is used with most bicycles, for example MTB bike, mountain bike, road bike, etc.
WARM-HEARTED TIP: Please check the outer diameter of your bicycle seat tube. Measure the inner diameter of the old clamp. Or measure the outside diameter of the seat tube. Then make the right choice.
9. Fouriers Seatpost Shim 31.6mm to 30.9mm Bicycle Seat Post Adapter Reducing Sleeve Shim for Mountain Bike Seat Post Tube Shim
Feature
This is a Lightweight Seatpost Shim, It is Used to Make Your Seatpost Fit into Your Oversized SeatpostMaterial: AL6061-T6
Size: 31.6mm to 30.9mm
Length: 90mm
Weight: 8g/pcs
10. Gazelle Trading Seatpost Shim Seat Post Tube Sleeve Adapter 27.2mm to 28.6mm/30.0mm/30.4mm/ 31.6mm for Mountain Bike,Road Bike,MTB,BMX,Fixie Gear
Feature
Inner diameter is 27.2mm/1.07inch, 4 types of outer diameter to choose.use this seatpost sleeve adapter ring, you can use 28.6mm/30.0mm/30.4mm/31.6mm seatpost on your 27.2mm bike seatpost.Can be converted to 27.2 seatpost diameter of 30.4 or 30.8 or 31.6 diameter, just this little accessories can save money to buy a seat tube.
Material: Aluminum alloy.Inner diameter: 27.2mm/1.07inch.Outer diameter: 28.6mm/1.13inch, 30.4mm/1.20inch, 30.8mm/1.21inch, 31.6mm/1.24inch.Length: app.6cm/2.36inch.Color: Black.
Seatpost adapter shim suit for MTB bike, mountain bike, road bike etc.
Please check your bike frame seat tube outside diameter. measure the inside diameter of your old clamp.Or measure the outside diameter of your seat tube (on your bike frame). then make a right choice.