2 ms·
Vehicle 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-
by KennyBlanken 4y ago
Vehicle 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.