The Toyo Proxes RA-1 does not really require heat cycling. The compounding is formulated to be very stable from the beginning of the tire's life to wear out. This is one of the reasons why many racers love the RA-1 for enduro's. Also, the compound is not very sensitive to the number of heat cycles you put on it. So even if you put a lot of short easy stints on them, they will not turn rock hard. So you CAN race on green tires. But if you are running at a very fast track such as Willow Springs in California, you may experience blistering if running full tread depth.