Originally Posted by
5th wheel
been reading the bag that the J concepts tires come in. was wondering about the compounds where it says the temperature like 76 to 90 degrees for this compound my question is would that be the track temperature that the tire is running on or the outside air temperature. thanks for the info
It is actually air temp and is just a base to work off. The rubber is affected by the ambient temp, much like shock oil, etc...
General rule of thumb is:
Hotter = harder compound
Cooler = softer compound