Top 10 31.6mm to 30.9mm – Bike Seat Posts

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1. Fouriers

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Fouriers Seatpost Shim 31.6mm to 30.9mm Bicycle Seat Post Adapter Reducing Sleeve Shim for Mountain Bike Seat Post Tube Shim 30.9-31.6mm

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Fouriers #ad - Size: 31. 6mm to 309mm. Length: 90mm. Material: al6061-T6. Weight: 8g/pcs. This is a lightweight seatpost shim, It is Used to Make Your Seatpost Fit into Your Oversized Seatpost.
BrandFouriers #ad
ManufacturerFouriers #ad
Part NumberAC-S007

2. freneci

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Freneci Alloy Seat Post Bushing Bike Bicycle Seatpost Size Reducer Enlarger Shim Sleeves 30.9mm to 31.6mm, Black

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freneci #ad - High quality aluminium alloy material, high strength, lightweight and solid enough. Full cnc precision machining with smooth edges which won't hurt your finger. Suitable for mtB bike, mountain bike, road bike etc. Custom sleeve to space 309 or 31. 6 seatpost to larger or smaller seat tubes. To change your seat post size easily with this bushing without changing seatpost.
Brandfreneci #ad
Manufacturerfreneci #ad
Part Numberb2351550cb50ee86f38aac5298d607c4

3. TiTo

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Dia 31.6mm, TiTo Titanium Alloy After Float seatpost Apply to Road Bike MTB Bike seatpost Bicycle Parts 27.2mm/30.9mm/31.6mm After Float 10

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TiTo #ad - Size: dia 27. 2mm dia 309mm dia 31. 6mm. Logo: tito Titanium or customized. Length: max 350mm and can be customized. Material: Titanium Alloy Gr9. Brand: TiTo.
BrandTiTo #ad
ManufacturerOuyuan New-metal #ad
Part NumberTiTo-SP-SE

4. MagiDeal

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Black, Road Bike, MagiDeal Alloy Seatpost Adapter Shim 30.9mm 31.6mm Bicycle Seat Post Tube Adaptor Reducing Sleeve Shim for Mountain Bike, Folding Bicycles

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MagiDeal #ad - High quality aluminium alloy material, high strength, lightweight and solid enough. Suitable for mtB bike, mountain bike, road bike etc. Custom sleeve to space 309 or 31. 6 seatpost to larger or smaller seat tubes. Full cnc precision machining with smooth edges which won't hurt your finger. To change your seat post size easily with this bushing without changing seatpost.
BrandMagiDeal #ad
ManufacturerMagiDeal #ad
Part Number340e3f8e9e2fb6c8958f53387306d1fe

5. Fouriers

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Fouriers Bicycle Seat Tube Adapter Bike Seatpost Reducer Shim 27.2mm 30.9mm 31.6mm Ø31.6mm xØ30.9mm

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Fouriers #ad - Spec: od Ø31. 6mm x id Ø309mm. Weight: 9g. Length:90mm. Material: aluminum alloy, AL6061-T6. Color: black.
BrandFouriers #ad
ManufacturerFouriers #ad
Part NumberAC-S007

6. GYAM

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GYAM Suspension Seatpost 25.4mm 27.2mm 28.6mm 30.4mm 30.9mm 31.6mm MTB Bicycle Mountain Telescopic Hydraulic Shock Absorber Seatpost,25.4mm

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GYAM #ad - Excellent quality comply to international bicycle safety standard ISO 4210 Full aluminum 6061 body ensure the lightweight, surface anodized. Then buy same size from the option. Various usethe bicycle seatpost offers easy-to-set, durable use which makes this bike seatpost shock absorber available for mountian bike, BMX bike, secure, commuter bike.

Rebound force adjustable by tighten or loose the bottom screw. 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. Take out your current seatpost, the diameter marked on it's lower area.

Shock absorber the bike seatpost dapmens vibration effecitvely as it's spring coil and damper rubber equipped inside while riding. Designed with an adjustable pre-load on the bottom, the bike suspension seat post can change the amount of force required to better abosorb the vibration according to your body shape. Pay attention to choose correct diameter size wrong size will not work and will cause return.
BrandGYAM #ad
ManufacturerGYAM #ad
Part Number581-244-912

7. Bynccea

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Bynccea Bike Seatpost 27.2mm 30.9mm 31.6mm Bicycle Seat Post 400mm for Mountain Bike Road Bikes MTB BMX

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Bynccea #ad - 12-month warranty:quality guarantee. If you’re not 100% satisfied with your bike seatposts, simply send us a message and we’ll take care of you. Pay attention to choose correct diameter Size:Take out your current seatpost, the diameter marked on it’s lower area. Then buy same size from the option. Material:forged aluminum alloy 6061 T6. Bynccea mtb seatpost with adjustable head, convenient to install. Mountain bike seatpost size: 27. 2mm/309mm/31. 6mm, total length: 400mm.
BrandBynccea #ad
ManufacturerBynccea #ad
Part NumberSeatpost-2

8. Cane Creek

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Cane Creek Black Alloy Thudbuster G4 ST Suspension Post 30.9mm Includes 50mm of Travel to Significantly Diminish Shocks and Impacts SP6A309

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Cane Creek #ad - Installing and adjusting the seat on the new thudbuster is easier than ever with a single bolt design that secures the seat with a few turns of a standard hex tool; Medium firm elastomer pre-installed from the factory - soft and firm elastomers included.

The all new thudbuster is now able to support riders up to 330lbs and incorporates a tool-free, interchangeable elastomer system to quickly and easily adjust the seat post for a variety of rider weights; Designed specifically with the rigors of e-bikes and daily commuting in mind, the new Thudbuster ST includes 50mm of travel to significantly diminish shocks and impacts. Sold each. Length: 375mm; material: Alloy; Weight: 580g. Outer diameter: 309mm; color: black; Setback: 0mm.
BrandCane Creek #ad
ManufacturerCANE CREEK #ad
Part NumberOCP-SP6A309

9. BESNIN

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BESNIN 27.2mm 30.9mm 31.6mm Seat Post 350mm 400mm,Bike Seat Post Bicycle Saddle Angle Adjustable Seatpost for MTB Road Bike BMX 31.6350mm

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BESNIN #ad - Size: 31. 6mm1. 24 in × 350mm13. 78 in,outside diameter:31. 6mm,total length: 350mm,Weight:300g066 lb. Warm tip: please see the 2th and last pictures for product measurement information.

Material:aluminium alloy 6061tube part ,Anti-corrosion, anti-oxidation,suit for long cycling. The seatpost outside diameter is 31. 6mm1. 24 in, please measure your bike and choose the right model. Note:the bicycles larger or smaller than 31. 6mm are not suitable!!!! Suitable for most road bike, mtb, downhill bike, DH, mountain bikes, bmx, fixed gear bicycle, track bike, etc. Adjustable:clamp head angle adjustable, easy to install. You can find a comfort saddle angle for your personal love.
BrandBESNIN #ad
ManufacturerBESNIN #ad
Part NumberBESNIN

10. TUSITA

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Bicycle Mountain Road MTB Accessories, TUSITA Seatpost Quarter Turn Mount Compatible with Garmin Varia Rearview Bike Radar RTL510 RTL515 RVR315, Cycling 27.2mm 30.9mm 31.6mm Bars Navigators Bracket

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TUSITA #ad - More versatilecompatible with Variant Rearview Radar, Variant Smart Bike Lights. It is widely used in road bikes with 27. 2mm, help to keep your varia on your bicycle no matter the terrain. Durable constructioncreated from advanced injection moulded co-polymer.

Wide compatibilitythis mount compatible with garmin varia rearview bike radar, 309mm and 31. 6mm bars, varia rtl515, varia rtl510, Varia RVR315. It is strong enough to keep your Varia on your bicycle no matter the terrain. Safe & securewe are confident that upgrading to a tusita varia mount will give you piece of mind knowing you’ve chosen the best way to securely lock and perfectly position your Varia on your bike so you can focus on your goals, whether that be having fun or going fast, or both.

Quick & easy to installmount on your bicycles handlebars in under 60 seconds. Convenient tool-free installation makes it very easy to install and disassemble from any Bicycle Handlebar, only need to locate and lock nut.
BrandTUSITA #ad
ManufacturerTUSITA #ad