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The Best 30.9 to 31.6 shim of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best 30.9 to 31.6 shim of 2022. Check our ranking below.

2,218 Reviews Scanned

SaleRank No. #1
Harilla Seatpost Shim Aluminum Alloy 100mm Long Conversion Adapter, 30.9 to 31.6
  • Made of aluminum alloy material, anti-rust and durable.
  • Suit for road bike, mountain bike, , BMX. Let you build your own unique !
  • Length about 100mm/3.9inch
  • To change your seat post size easily with this bushing without changing seatpost
  • Easy to install, no other tools needed, provide convenience for your use.
Rank No. #2
GANOPPER Seatpost Shim 31.6 to 30.9 Bicycle Seat Post Adapter Reducing Sleeve Shim for Mountain Bike Seat Post Tube Shim (30.9-31.6mm)
  • Material: bicycle Seatpost Shim is made of high quality 6061 aluminum alloy, CNC machining CD texture surface ,anti-rust and durable
  • Feature:Use this bike post shim, 30.9 ID Seat Post shim can be converted to 31.6 bike seat post, bike seatpost shim can help you change the bicycle seat tube outer diameter to meet your needs
  • Size: 31.6 to 30.9 seatpost shims. Length: 100mm.
  • 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. - - -Because of hollow design,In the process of transportation are squeezed may be out of shape,Please kindly exchange one
  • Application: Bicycle Seatpost reducer matches well with most bicycles, such as MTB ,BMX ,mountain bike, road bike,and more, you can easily adjust the diameter of the bicycle seat post, eliminating the trouble of repurchasing the bike seatpost.
Rank No. #3
catazer Bicycle Seatpost Adapter Shim Sleeve Bicycle Seat Post Tube Adapter for Mountain Bike Road Bike Electric BMX, Fixie Gear 25.4/27.2/28.6/30.1/30.4/30.8/31.6/33.9/34.9/36mm (27.2mm to 25.4mm)
  • Material: aluminum alloy
  • Length:60mm.
  • Size:25.4mm to 27.2mm(Convert a 25.4mm seat post to fit a 27.2mm seat tube).
  • CNC precision machining,good anti-slip performance.
  • Note: 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 the right choice.
Rank No. #4
Fouriers Bicycle Seat Tube Adapter Bike Seatpost Reducer Shim (31.6mm to 30.9mm)
  • Material: Aluminum alloy,AL6061-T6
  • Spec: OD Ø31.6mm x ID Ø30.9mm
  • Color: black
  • Length:90mm
  • Weight: 9g
Rank No. #5
MBP Alloy Bicycle Seatpost Shim 80mm Length 30.9-31.6/27.2-30.9 (27.2-30.9)
  • ✅MBP Alloy Seatpost shims.
  • ✅SIZES: 30.9 to 31.6mm & 27.2mm to 30.9mm
  • ✅CONSTRUCTION: Lightweight Alloy shims. (27.2-30.9 knurled) (30.9-31.6 smooth) Lenght: 80mm
  • ✅ENABLES: 30.9-31.6 enables a 30.9mm seatpost to be used in a 31.6mm seat tube / 27.2-30.9 enables a 27.2mm seatpost to be used in a 30.9mm seat tube.
  • ✅ All MBP Products come with a 1 Year Manufacturer warranty against defects. Satisfaction Guaranteed. ✅
Rank No. #6
BNVB Alloy Bike Seatpost Shim, 100mm Length Aluminum Bicycle Reducing Sleeve Seat Post Tube Adapter, Diameter Switch 30.9 to 31.6mm
  • Length: 100mm, Guarantee you seatpost insert safe.
  • Material: Made of high quality 6061 aluminum alloy, CNC machining CD texture surface, Light weight, anti-rust and durable.
  • Easy Install: Easy to install and remove, Convenient for you to Switch Seatpost in need.
  • Suit for MTB bike, mountain bike, road bike etc.
  • Note: Please measure the outside diameter of your seatpost, (or check the size marks on the seatpost). Then measure your bike frame seat tube inside diameter. Then choose right Size.
Rank No. #7
Fastace Bike SeatPost Adapter Shim Aluminum Alloy Bicycle Seatpost Reducing Sleeve Tube Adapter 25.4mm/27.2mm/30.9mm/31.6mm for Road Bike, Mountain Bike, MTB, BMX (Seatpost shim-30.9mm to 31.6mm)
  • 【Length】60mm, Guarantee you seatpost insert safe.
  • 【Compatible With】Compatible with most bicycles, Suitable for MTB bike, road bike, etc. You can easily adjust the diameter of the bicycle .seat post and no more wasting money on repurchasing a seat post.
  • 【Different Size】25.4 to 27.2, 25.4 to 31.6, 27.2 to 30.9, 27.2 to 31.6, 30.9 to 31.6. A variety of specification conversions can solve the problem of inappropriate size of your frame and seat tube.
  • 【HIGH QUALITY】Made of high-quality aluminum alloy, high strength and light weight; anodizing process, not easy to rust, not easy to paint off; CNC cutting, neat cutting, smooth lines.
  • 【EASY TO INSTALL】Easy to install and remove, no other tools needed, just a few seconds to install,convenient for you to use. And you can change the size of the bike seat tube as you want.
Rank No. #8
27.2 Suspension Seatpost 350mm LITEONE MTB Shock Absorber Damper Seat Post with 28.6mm 30.9mm 31.6mm Seatpost Shim Suitable for Mountain Bike Road Bicycle MTN BMX ( include 3 Tube Adapters 0 Setback )
  • Spring Coil Suspension: Build-in spring coil and damper rubber absorb the vibration while riding, the seat post comfort your riding experience, improve the shocks. Rebound force adjustable by tighten or loose the bottom screw
  • Size: 27.2 × 350mm (apx 585g/pc), Total length: 350mm, Strength: 4.9 levels ultra high strength. Zero Offset
  • How to Choose the Size: 1.Check the diameter of the original seatpost, choose the same size as the original diameter.2.Measure the inside diameter of the frame tube
  • Material: Made of Aluminium Alloy 6061T6 which is durable. Frosting finish, exquisite workmanship, nice touch feeling. With adjustable head, Easy to install
  • With 3 Seatpost Shim: 27.2mm to 28.6mm, 27.2mm to 30.9mm, 27.2mm to 31.6mm, you can choose with your need
Rank No. #9
DJC Bike Suspension Seatpost Rubber MDU Memory Damper Shock Absorber Seat Post Ultralight Aluminum Body 27.2 28.6 30 30.4 30.9 31.6mm MTB Road Bike (Black 30.4mm(by Shim Adapter))
  • Memorial Damper Rubber Inside: Rubber MDU absorb shocks during riding. Let you feel much comfortable compare to use a non-suspension post. Suspension travel 45mm/ 1.77inch. 10 years lifespan.
  • ★Pay Attention to Choose Correct Diameter Size★ . Wrong size will not work and will cause return. Take out your current seatpost, the diameter marked on it’s lower area. Then buy same size.
  • Clamp Angle Adjustable: Saddle clamp angle can adjust in -5 degree to +18 degree. Clamp offset 13mm.
  • Quality Good: Manufactured by world famous bike parts manufacturer. Aims to high end market. Comply to international bicycle safety standard ISO 4210. Aluminum body for lightweight, 460g/ 1 lbs only.
  • 2 Years Warranty: We are confident to the product quality and offer 2 years warranty. It fit for riders weight 60kg/ 132lbs to 120kg/ 264lbs.
Rank No. #10
Yiju Seatpost Shim 100mm Long Post Tube Converter Adapter for Mountain Road Bike Cycle Accessories //30.9/, 30.9 to 31.6
  • Made of aluminum alloy material, anti-rust and durable.
  • Easy to install, no other tools needed, provide convenience for your use.
  • Length about 100mm/3.9inch
  • To change post size easily with this bushing without changing seatpost
  • Suit for road bike, mountain bike, MTB, BMX. Let your own unique bicycle!

Last update on 2023-04-19 / Affiliate links / Images from Amazon Product Advertising API

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