How do you check your tire pressure ... warm or cold? I think I read in the manual the back tire pressure should be 38 to 40 lbs cold. I inflated it to this spec and what a miserable rough ride it was. I also couldn't keep the back tire from breaking loose. When I checked the tire pressure after riding for awhile (warm), it was @ 48 lbs. I deflated it down to 38 lbs (warm) and everything is fine again. Used the same air pressure tester so it wasn't just a matter of an inaccurate gage.