Interesting analysis. The thought occurs to me -- how accurate can a tiny sensor hung on the valve stem of a moving vehicle be?
""+ or - 1psi according to Johnson Controls, which makes millions of OEM TPMS sensors""
https://www.quora.com/How-accurate-are-the-tire-pressure-readings-in-your-vehicleand...
""There are two types of TPMS: indirect and direct. The lower-cost, indirect TPMS doesn't actually monitor air pressure. Rather, the indirect TPMS uses the antilock braking system's wheel-speed sensor to detect that one tire is rotating faster than its mates. (An underinflated tire has a smaller circumference so it has to roll faster to keep up.) Thus, there's a large margin of error in indirect systems.
Meanwhile, a direct TPMS measures a tire's actual pressure. Such systems are usually accurate to within 1 psi. Current direct systems use a gauge mounted to the wheel or tire valve. This gauge sends a signal to the car's computer. How the data is interpreted and displayed in the car with a direct TPMS depends on whether it is a low-line or high-line unit.""
https://www.edmunds.com/car-safety/tire-pressure-monitors-can-you-rely-on-them.htmlCool! Learned something new.
