shims for stems
 

Ok I'm about to shim a Thompson 1&1/8" stem to a 1" unthreaded fork. Does anyone have any experience doing this? Will the stem slip? I'm having trouble finding decent 1" threadless stems so I figured this would be the best option. Share some advice.

most stems come with a shim.
or just get one from your LBS

1" threadless stems are more or less extinct. The shim works fine, however. My LBS has a box full, and I can usually grab one for free or near free.

I use a shimmed Ritchey pro (Well, I've used 3 different Ritchey stems by now...) on a 1" steerer. Zero problems, though I've only had it since july.

The thomson shim is the jam. Hasn't moved at all.

awesome. Yeah I have an older 1" threadless steamroller. I love the frame but hate the curent stem I have and couldn't find any decent options. Thanks for the advice I'm going to pull the trigger on the thompson.

there's a specific shim for the older thomson stems with the integrated clamp, might want to look for that.

there is no need whatsoever to use a thompson specific shim. I used just a normal shim and eveything was super tight and great.

just adding my voice to the chorus - done it several times, never a problem. huge clamp area and relatively little force hitting it. have at it with confidence

nitto makes a shim

I'm running the Thompson Elite X2 on my Soma with the shim. The thing is, the shim is a bit too tall for their newer stems (X2 and X4), since it wasn't designed for them. You'll either have to shave it down a bit, run a spacer above the stem, or try another shim.

When I emailed them directly about it, they apologized and told me to make sure the trimmed shim was burr-free, or just to try the Problem Solvers shim.

PS, there's a crapload of Cinelli Alters up on Ebay now. Probably the coolest 1" stem ever made, if you can handle the steep drop.