Try the pressure calculator at zipp.com and be sure that your pump gauge is accurate. I replaced my very old gage with something much larger and easier to read, with a more appropriate range. At 140 pounds or less, I use 62/64 in my 28mm michelin tubeless.
https://www.amazon.com/dp/B0087UYDPS...v_ov_lig_dp_it
Last edited by DaveSSS; 04-01-21 at 07:56 AM.