Originally Posted by
Ross200
2.1 inch = 53.34 mm WIDTH. Using Carbon's equation, his recommended pressure will be more like 56 psi, not 110 psi. Certainly more in line with the traditional 1/3 more than half bike pressure.
OP doesn't mention rim type/width which needs to be considered. More than a few rims are blowing apart from wide tires at high pressure.
Right. I mistook the diameter size for the width and the width for the version increment, like software. Using my equation for pressure also puts you below the rim manufacturer's max stress. Max sidewall pressure is usually more related to rim strength than to some tire explosion possibility.