I don't thing RP's are an option anymore. I would think Sorex has the edge then Jaco and last would be Muchmore's. After that what else is there?
Then again it's all about availability?
If there's 150 entries and each racer is allowed 4 sets each not counting the Pro drivers and then at least another 2 to 4 sets for practice. were talking a ton of premonted tires.
Who has that many tires available?
Just my2$