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Hi has anyone done a travel reduction with a shim like the one up or the internal routed brand x. I have googled TIL the cows come home but no joy. The reason for asking I have just got a 170mm thinking I could reduce it but I’m not sure now.
Pretty sure it can’t be done due to the position of the brass keys inside the post.
Shorter stack height saddle may be enough to make the 170mm work for you, if not then 150mm would probably have been enough drop.
Buy the one up shim and give it a go. It takes 5 minutes and costs <£10, so not much lost if it doesn't work out.
I've used OneUp shim in 125mm and 150mm Brand X / TranzX posts I think the 170mm is same. I've posted pics on here before.