HELP!!! Tire size and pressure.
This is all very confusing. I'm trying to figure out what tire pressure I should be using for each of my 2 bikes. None of the charts I read come up with the same figures plus neither sizes stamped on each bike is accurate. So here is what I have. My vintage road bike has tires that are stamped 27"s X 1 1/8 " but in actuality the tire measures 23mm. Tire pressure is stamper 95- 105 psi. My hybrid bike has tires that are stamped 700mm x 28 mm but actually measure 26 mm wide. Tire pressure stamped on it is 115-125 psi. So if I'm 180 lbs and my bikes are 25 lbs. what should my tire pressure be? Thanks Bob