I foolishly bid on the wrong wtem off ebay and now have a 1.5″ stem lying around unused. I could use it on another bike- can you get reducer shims for this?

The reducer shims for a 1-18″ to 1″ steerer shims would also work for this I assume, just need to be opened up a bit to stretch onto the larger steerer… though that does sound potentially dodgy… maybe someone nice on here will machine one for you?

The reducer shims for a 1-18″ to 1″ steerer shims would also work for this I assume

I’m no engineer but surely that would just reduce an 1 1/4″ stem to 1 1/8″, not a 1 1/2″?

Me neither – good point… 😆

Yep, I did the same thing and had to make a sleeve to reduce an 1 1/4″ stem down to 1 1/8″. It works fine as long as you put a slit in the sleeve that lines up with the slit in the stem so it can tighten up.

Can’t you return the part?