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USE Seat Post Shim - 30.9 mm ID

Customer Reviews (2)
4.5 / 5| Write your review
£6.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Product Reviews (2)
Questions & Answers (2) Q & A
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
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Product Reviews (2)
Overall Product Rating 4.5 / 5
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
05 Sep 2016
4 / 5
I recommend this product
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 (2)
What size shim will I Need to use a 31.6 dropper post when the seat post on my gt is saying 34.9
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?

You will need - SJS Cycles part number : 17628

Hi Can You Confirm If The 30.9Mm Id 34.9Mm Od Shim Is Alloy Or Plastic? Thanks.
05 Jun 2017

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