Quote:
Originally Posted by RidingOnRailz
I’m sorry if I was vague. What I was asking for was an approximation of the surface area, in square inches, of the inside of the tire, not of the contact patch with the road
|
You could estimate it. Making the assumption that the tread and casing are a certain thickness and the sidewalls a different thickness, then construct toroidal shaped object that closely fit those dimensions but is truncated at the nominal diameter.
I did part of the calculation once, many years ago, using an actual drawing of a cross section of a tire with a reiterative process that actually gave me the inside perimeter. I did that to calculate the strength of the tire needed to contain the inflation pressure. I didn't take it to the next step of sweeping that perimeter into a volume shape, but the math is rather trivial once you have the perimeter. The perimeter is the hard math, and I am sure you'd have to derive it yourself. I'll bet no one has published such a formula on the 'net.