|
A) IMO a tire is not going to fail from a defect on the tread patter but from a failure of the structure that contains the pressure from the tire. I dont know if you missed what I said but a higher aplitude of the mean stress reduces the fatigue strength. A 10% higher inflation pressure should correspond to a 10% higher mean stress on the tires casing.
B) Yes they warm the tires and this is accomplished through tire sliping (spinning) but the dragster does not spin the tires for the entire 1320 feet of its timed run so they stop generating a significant level of heat after they stop spinning. If traction was dependent only on temperature then tire width or pressure would not matter as temperature can be totally controlled by the time of the burnout before the run.
Tire pressure carries no torsional load only vertical load. The shock that the tires adsorb is related to the height of the sidewall, again width plays little to no role.
|