Top 16 best seatpost shim

When you looking for seatpost shim, you must consider not only the quality but also price and customer reviews. But among hundreds of product with different price range, choosing suitable seatpost shim is not an easy task. In this post, we show you how to find the right seatpost shim along with our top-rated reviews. Please check out our suggestions to find the best seatpost shim for you.

Product Features Editor's score Go to site
Fouriers Aluminium Bike Seat post Shim Convert 30.9/31.6/27.2mm Seat Tube Adapter (31.6mm-30.9mm) Fouriers Aluminium Bike Seat post Shim Convert 30.9/31.6/27.2mm Seat Tube Adapter (31.6mm-30.9mm)
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Deboc MTB Bicycle Seat Post Shim Tube Sleeve Adapter 27.2mm to 30.8mm Deboc MTB Bicycle Seat Post Shim Tube Sleeve Adapter 27.2mm to 30.8mm
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Sunlite Alloy Seat Post Shim, 27.2 Inner Diameter, 28.6 Outer Diameter Sunlite Alloy Seat Post Shim, 27.2 Inner Diameter, 28.6 Outer Diameter
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Cane Creek .ST27316 Seatpost Shim, 27.2 I.D. TO 31.6 O.D. Cane Creek .ST27316 Seatpost Shim, 27.2 I.D. TO 31.6 O.D.
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Adams Trail-A-Bike Seat Post Shim Kit Sleeve Set Adams Trail-A-Bike Seat Post Shim Kit Sleeve Set
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Origin8 Multi-Fit Seatpost Shim Origin8 Multi-Fit Seatpost Shim
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Zadaro Bicycle Bike Seat Post Tube Seatpost Reducing Sleeve Adapter Adjust Diameter (25.4-28.6) Zadaro Bicycle Bike Seat Post Tube Seatpost Reducing Sleeve Adapter Adjust Diameter (25.4-28.6)
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Tmars Seatpost Shim 27.2mm Inner Diameter to 30.9 Outer Diameter 44 grams Tmars Seatpost Shim 27.2mm Inner Diameter to 30.9 Outer Diameter 44 grams
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SEAT POST SUNLITE SHIM 25.4id26.0od ALY SEAT POST SUNLITE SHIM 25.4id26.0od ALY
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Gio Seatpost 27.2 to 30.9mm Shim Gio Seatpost 27.2 to 30.9mm Shim
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Fouriers Bicycle Seat Tube Adapter Bike Seatpost Reducer Shim 27.2mm 30.9mm 31.6mm (31.6mm x30.9mm) Fouriers Bicycle Seat Tube Adapter Bike Seatpost Reducer Shim 27.2mm 30.9mm 31.6mm (31.6mm x30.9mm)
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Gio Seatpost 27.2 to 31.6mm Shim Gio Seatpost 27.2 to 31.6mm Shim
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ACTION SEATPOST SIZER FITTER 25.4-26.4 ACTION SEATPOST SIZER FITTER 25.4-26.4
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eXotic Carbon Seat Post Shim 34.9 mm to 31.6 mm, Spacer Length 150mm, Only 40gm eXotic Carbon Seat Post Shim 34.9 mm to 31.6 mm, Spacer Length 150mm, Only 40gm
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27.2/30.4/30.8/31.6mm Alu MTB Mountain Bike Seat Tube Conversion Road Bicycle Seatpost Adapter Cycle Seat Post Shim Bike Part (27.2change31.6) 27.2/30.4/30.8/31.6mm Alu MTB Mountain Bike Seat Tube Conversion Road Bicycle Seatpost Adapter Cycle Seat Post Shim Bike Part (27.2change31.6)
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Jili Online 31.6/30.8/30.4mm Seatpost to 27.2mm Bike Seat Tube Sleeve Shim Adapter-60mm - Diameter 31.6mm/1.24inch Jili Online 31.6/30.8/30.4mm Seatpost to 27.2mm Bike Seat Tube Sleeve Shim Adapter-60mm - Diameter 31.6mm/1.24inch
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Reviews

1. Fouriers Aluminium Bike Seat post Shim Convert 30.9/31.6/27.2mm Seat Tube Adapter (31.6mm-30.9mm)

Feature

seatpost shim
Super light aliminium

Description

Material: AL6061-T6
Spec: OD 31.6mm x ID 30.9mm (Length:90mm)
OD 31.6mm x ID 27.2mm (Length:80mm)
OD 30.9mm x ID 27.2mm (Length:90mm)
Color: Anodized black, silver
Weight: 9g~41g
This is a lightweight seatpost shim. It is used to make your seatpost fit into your oversized seat tube.

2. Deboc MTB Bicycle Seat Post Shim Tube Sleeve Adapter 27.2mm to 30.8mm

Feature

Use this seatpost sleeve adapter ring, you can use 30.4/30.8/31.6mm 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...
Inner diameter is 27.2mm/1.07inch, 3 type of outer diameter to choose.
Suit for MTB bike, mountain bike, road bike etc.
Material: Aluminum alloy. Inner diameter: 27.2mm/1.07inch Outer diameter: 30.4mm/1.20inch; 30.8mm/1.21inch; 31.6mm/1.24inch ;Length: app.6cm/2.36inch.

Description

Features: 1.Inner diameter is 27.2mm/1.07inch, 3 type of outer diameter to choose. 2.Use this seatpost sleeve adapter ring, you can use 30.4/30.8/31.6mm seatpost on your 27.2mm bike seatpost. 3.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. 4.Suit for MTB bike, mountain bike, road bike etc. 5.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. Specification: Material: Aluminum alloy Inner diameter: 27.2mm/1.07inch Outer diameter: 30.4mm/1.20inch; 30.8mm/1.21inch; 31.6mm/1.24inch Length: app.6cm/2.36inch(Optional) Color: Black Quantity: 1 Pc Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Package includes(Without real package): 1 x Seat Post Tube Warm tips: 1.We suggest our customers buying it very soon of your planned use. 2.Any problem of this product once reaches you,please contact us asap,we will solve it for you.

3. Sunlite Alloy Seat Post Shim, 27.2 Inner Diameter, 28.6 Outer Diameter

Feature

Fixed sizing

Description

SEATPOST SUNLT SHIM 27.2id28.6od ALY

4. 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 seatpost
Works with Cane Creek Thudbuster ST Seatpost (see item #50-2678) and Cane Creek Thudbuster LT Seatpost (see item #50-2677)

Description

Shim for road bike or mountain bike seatposts.

5. Adams Trail-A-Bike Seat Post Shim Kit Sleeve Set

Feature

Three piece shim kit. 25.4mm-26.6mm, 26.8mm-29.2mm and 29.4mm-31.0mm.

Description

Three piece shim kit. 25.4mm-26.6mm, 26.8mm-29.2mm and 29.4mm-31.0mm.

6. Origin8 Multi-Fit Seatpost Shim

Feature

Multi-Fit
Alloy
25.4 ID

Description

SEATPOST OR8 SHIM 25.4id 26.4-28.0odUNI

7. Zadaro Bicycle Bike Seat Post Tube Seatpost Reducing Sleeve Adapter Adjust Diameter (25.4-28.6)

Feature

Bicycle Seatpost Reduction Sleeves Bike Seat Post Tube Adapter Reducing Sleeve Adjust Diameter.
Technology: integrated CNC turning.
Diameter:27.2 - 28.6mm
Length (mm):60mm
Components:Seatpost shim

Description

100% brand new and high quality

Features:
Bicycle Seatpost Reduction Sleeves Bike Seat Post Tube Adapter Reducing Sleeve Adjust Diameter.
Technology: integrated CNC turning.
Diameter:27.2 - 28.6mm
Length (mm):60mm
Components:Seatpost shim
Type:seatpost adapter
For:mtb accessories
Material:Aluminum alloy

Specifications:
25.4-27.2
25.4-28.6
27.2-28.6
27.2-30.8
27.2-31.6
27.2-33.9
Color:Black
Quantity: 1 pc

Note:
No retail package
Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Package includes:
Bike Reduction Sleeve x 1

8. Tmars Seatpost Shim 27.2mm Inner Diameter to 30.9 Outer Diameter 44 grams

Feature

Post Shim Converter 27.2 to 30.9
Length: 100mm
Material : Alloy
Weight : 44 g

Description

Post Shim Converter 27.2 seat post to 30.9 tube Only 44 grams.

9. SEAT POST SUNLITE SHIM 25.4id26.0od ALY

Feature

Fixed sizing

Description

SEATPOST SUNLT SHIM 25.4id26.0od ALY

10. Gio Seatpost 27.2 to 30.9mm Shim

Feature

27.2 Inner diameter, 30.9 outer diameter - will convert a 27.2 seat post to fit a 30.9 seat tube.
Length: 100mm
Material : Alloy
Weight : 44 g

Description

Seat post Shim Converter 27.2 post to 30.9 tube 44 grams.will convert a 27.2 seat post to fit a 30.9 seat tube.

11. Fouriers Bicycle Seat Tube Adapter Bike Seatpost Reducer Shim 27.2mm 30.9mm 31.6mm (31.6mm x30.9mm)

Feature

Material: AL6061-T6
Spec: 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

Description

Material: AL6061-T6
Spec: 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

12. Gio Seatpost 27.2 to 31.6mm Shim

Feature

27.2 Inner diameter, 31.6 outer diameter - will convert a 27.2 seat post to fit a 31.6 seat tube.
Length: 100mm
Material : Alloy
Weight : 52 g
**Please notice ! this is not a universal shim. it will only convert a 27.2 seat post to fit a 31.6 seat tube**

Description

Seat post Shim Converter 27.2 post to 31.6 tube 52 grams.Will convert a 27.2 seat post to fit a 31.6 seat tube.

13. ACTION SEATPOST SIZER FITTER 25.4-26.4

Description

SEATPOST SIZER FITTER 25.4-26.4 80MM FITTED ADAPTER

14. eXotic Carbon Seat Post Shim 34.9 mm to 31.6 mm, Spacer Length 150mm, Only 40gm

Description

Frame SparesCarbon seat post shim 34.9mm to 31.6mm Weight: 40gm Length: 150mm Please note that the white spacer shown is not included with this shim. It is part of the double seat clamp CC-C0638. You do not need the white spacer to use this shim. Product Code: CC-AMP04

15. 27.2/30.4/30.8/31.6mm Alu MTB Mountain Bike Seat Tube Conversion Road Bicycle Seatpost Adapter Cycle Seat Post Shim Bike Part (27.2change31.6)

Description

Model: seatpost conversion tube
Material: Aluminum alloy Alu
Size: 27.2mm Change 30.4mm
27.2mm Change 30.8mm
27.2mm Change 31.6mm
Color: black
Use for: fixed gear bike ,road bike ,track bike ,mountain bike,folding bike,BMX and so on Constructed of ultra light and strong 6061 aluminum alloy.
CNC machining, CNC thread make it non-slip
Easy to install.
Suitable for road and mountain bike.
package
bicycle seattube converting connector *1

16. Jili Online 31.6/30.8/30.4mm Seatpost to 27.2mm Bike Seat Tube Sleeve Shim Adapter-60mm - Diameter 31.6mm/1.24inch

Feature

Made of aluminium alloy
Inner diameter is 27.2mm/1.07inch, outer diameter is 31.6mm/1.24inch
Use this seatpost sleeve adapter ring, you can use 27.2mm seatpost on your 30.4/30.8/31.6mm bike seatpost
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

Description

Description:

Made of aluminium alloy
Inner diameter is 27.2mm/1.07inch, 3 type of outer diameter to choose
Use this seatpost sleeve adapter ring, you can use 27.2mm seatpost on your 30.4/30.8/31.6mm bike seatpost
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

Specification:

Material: aluminium alloy
Color: Black
Inner diameter: 27.2mm/1.07inch
Outer diameter: 30.4mm/1.20inch; 30.8mm/1.21inch; 31.6mm/1.24inch
Length: 6cm/2.36inch

Package Includes:

1 Piece Seat Post Tube

Conclusion

By our suggestions above, we hope that you can found the best seatpost shim for you. Please don't forget to share your experience by comment in this post. Thank you!