I want to replace the quick release clamp on my Juiced Ripcurrent S step through with a screw-in clamp. It seems the outside diameter of the present stem is 38.1 mm. The quick release clamp has no markings on it. I noticed there is a thin aluminum shim inside the seatpost receiver on the bike, which I think makes it an odd size. Anyone have a suggestion or a solution that worked for you?