Problem Solvers Handlebar Shim Shimmy, Shimmy, Ya, Shimmy, Yam, Shimmy, Yay Gimme the bike so I can take it away. If you're using a handlebar that doesn't quite fit your stem, then you can easily shim it to fit it. The Problem Solvers Handlebar Shim allows you to mate mismatched handlebar and stem combos together, mounting a smaller bar in a stem with a bigger bore. This will make it so you can get back out on the trail fast. Features Available in multiple sizes Shims a smaller handlebar to fit a larger stem bore | Problem Solvers | Handlebar Shim Shim 25. 4 To 26. 0Mm And 45Mm Length | Aluminum