Handlebar Shim 31.8 - Wheels MFG

When you have a traditional sized bar and one of the new fat stems with a 31.8mm clamp, you need one of these shims to clasp the stem hard:
25.4-to-31.8 adapts 25.4mm handlebar (traditional mtn and city bike) to 31.8mm stem (new fat type)

26-to-31.8 adapts 26mm handlebar (traditional drop bar) to 31.8mm stem (new fat type)

Machined aluminum, made in the U.S.A. by Wheels Manufacturing.