Thanks for responding. I did have a local bike shop do the measurement as my 27.2mm post was too large. I would hope that they would have noticed a shim but I did not. However when purchasing tires they did bring out 26" tires and I had to show them it said 700c on the rim. They did hold on to my frame as they wanted to make sure the seat post fit when it comes in. If it does have a shim I'll be bummed.
Just got back from the shop. It was not shimmed and is definitely 26mm.
Last edited by ottobon100; 03-13-24 at 03:28 PM.