I run pro 4 and pro 2 a lot at the loft. I have tried a decent amount of tires and combos. What seems to work best for me is handlebars and suburbs. I like to run a m4 suburb on the back and mc on the front of my pro 2. I have tried m4 suburbs on all for corners and it was to aggressive. Pro 4 guys have had good luck with handle bars std super soft, ions m4, and suburbs as well. I have a set if wishbone aka super soft that I have used with success on the front of vehicles at times. You really can't go wrong with a soft or super soft tire if you like extra traction. To the guys that want a little less than mc will work and do fine.
If anyone has any questions about sct tires, classes, or even setups don't be afraid to ask or pm me.
Thanks
Larry Jones