Answered Ok to shim a 30.9 axs dropper to 34.9?

[PsiLoCybia]

I'm in the process of getting a 2020 Kenevo which has a 34.9mm seatpost. I have an AXS reverb dropper from my old bike which is 30 9mm. I have seen that there are shims available to accommodate this.

My question is; are there any negatives of shimming a 30,9 post into a 34.9mm? Is it an acceptable practice or could this cause warranty issues etc?

 

[steve_sordy]

I have done something very similar, ie a fairly thick shim. I found zero negatives. In fact you have a positive; you will never, ever, get your seat post stuck in the seat tube!

As for an acceptable practice, why do you think that there are so many people making shims? I cannot believe it will cause any warranty problems at all.

 

[YrianX]

Apparently Specialized is doing that originally from the factory on the new 2020 s-works levo...

 

[Dewi]

Works fine. I have had one for 2 years.

 

[BTTB]

I know this is very late, but may be useful for others.

Specialized do a shim for £10 which can be found here

Seatpost Shim 34.9OD - 30.9ID

Seatpost shim allowing 30.9mm seatposts to be used in frames requiring 34.9mm.

www.specialized.com