Quote:
Originally Posted by tony_r
140F, it can be driven beyond this but grip certainly falls off and at 220F, yeah tire will be done quickly I'm sure.
220F average temp is well beyond the capability of the majority of street tires. This is more within a pure race tire's capability. For example the BFG R1 has a peak optimal range of 220F per their tech sheet. The Hoosier R7 ( tire care guide) is a bit below that but I'm sure it will still operate fine, but best to consult a tire engineer for details. |
140F is super low!
The video posted previously is the second half of the first lap and the first half of the second lap. The audio and (lack of) over-yawing in the video indicates the clean nature of the driving involved, and the tire tread was between 195F and 235F when I pulled off after those two laps. The tire was already overheated and past its prime grip on that 2nd lap, but due to traffic in the first lap, there was no fast lap to be found, and no point in doing any more laps. The heat spread is not within an individual tire, but within different tires, due to the loading nature of buttonwillow.
What you're posting, is precisely why I am so against these "200TW street tires". They briefly offer the grip of an entry level slick, but have the heat tolerance and overheat-wear of a street tire.