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USE Seat Post Shim - 30.9 mm ID

Customer Reviews (5)

4.8 / 5| Write your review

£9.99

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Manufacturer :

SJS Cycles part number :

Manufacturer part number :

Details

The USE shim system is made to 100mm length, longer than other shims on the market. This gives your seat post much better support inside the frame. Designed with a "top lip" to stop shim sliding into the frame.

30.9mm Inner diameter

31.6mm, 32.4mm or 34.9mm Outer diameter

Product Reviews (5)

Questions & Answers (5) Q & A

Specification

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Product Reviews (5)

Overall Product Rating 4.8 / 5

By zsolt szretyko

18 Apr 2021

5 / 5

I recommend this product

Consnone

Proslightweight

Very lightweight and well made alloy shim,just make sure you choose the correct size,and colour, and apply a bit more grease .

Looks good....

By Richard

30 Mar 2018

5 / 5

I recommend this product

Proslonger than most seat post shims

Bought this shim based on other reviews to be able to use an old seat post on my new bike as a spare.....So I haven't used it yet, but it looks like it will do the job!

Brilliant little problem solver!

By Beka

09 Feb 2018

5 / 5

I recommend this product

ConsNone

ProsSimple to use, basically invisible

Just what I needed to make my new dropper post fit my bike. Fantastic fit, nice and secure and no issues with it slipping/not holding even when down hilling on some knarly terrain.

By William O'Connell

16 Dec 2017

5 / 5

I recommend this product

Consbit expensive after postage but ho-hum.

Proseasy to fit, good quality machined alloy

good item. came very carefully packaged to ensure no damage as the walls which are necessarily very thin (30.9 to 31.6). easy to install. needed it for my internally routed dropper post and it does easily cover the full length of the minimum insertion of the dropper. haven't used it in anger yet but the install was a doddle.

It Works

By simon

05 Sep 2016

4 / 5

I recommend this product

Conscost

Prosaccurate size match

Bit expensive for a thin piece of metal but it makes for a perfect fit of an undersized dropper post.

Questions & Answers (5)

30.9 to 31.6

By Marko

19 Aug 2019

I have 31.6 seatpost on my frame and i bought 30.9 dropper so which shim i need to buy?

SJS Customer Service:

Hi there,

the shim that you would need is the 31.6mm version.

Thanks.

30.8mm to 31.6mm seatpost, do you sell a shim that allows me to use 30.8mm post on my 31.6mm frame

By Martin McLean

03 Feb 2019

SJS Customer Service:

closest one would e.g. product 39557D316
many thanks
04/02/19

I have a Cube with a 31.4mm seatpost and have just bought a 30.9mm dropper post.

By Julian Barclay

18 Sep 2018

Can i get shim cut down from 31.6 to 31.4..!?

SJS Customer Service:

Hi there,

Although it is not recommended you could always file it down so it fits, but as we have never tried this we cannot say for certain whether or not it will work I'm afraid.

Thanks.

What size shim will I Need to use a 31.6 dropper post when the seat post on my gt is saying 34.9

By Shaun Fox

05 Dec 2017

My bike is a gt with 34.9 seat post want to ft a 31.6 dropper post. What size shim please?

SJS Customer Service:

Hi,

You will need - SJS Cycles part number : 17628

Thanks

Hi Can You Confirm If The 30.9Mm Id 34.9Mm Od Shim Is Alloy Or Plastic? Thanks.

By Alan

05 Jun 2017

SJS Customer Service:

Hi,

The 30.9mm-34.9mm Shim is made from alloy.

Thanks.