4 ms·
There's no point in precise measurement because tire pressure is going to vary widely over temperature and how laden the vehicle is.
by throwaway0a5e 4y ago
There's no point in precise measurement because tire pressure is going to vary widely over temperature and how laden the vehicle is.
- KennyBlanken 4y agoVehicle load changes the contact patch size, not the tire pressure (within reason.) Over fifty degrees (F) you'll see 5psi change for a passenger car tire (30-40psi.) A 10 psi difference requires a 90 degree differential.
- horsawlarway 4y agoI've routinely seen estimates at 1-2 PSI per 10(f) degree change (depending on tire) and 50+(f) degrees of warming over the first 30 minutes of driving at highway speeds. That's a change of between 12.5% and 33% depending on tire. Additional load doesn't change the total volume much - so it's not directly increasing pressure - but it can increase deformation (as you pointed out - contact patch size changes) creating more warming, which will increase pressure.