slider dirt oval foams

[nano cup]

Hey Guys, need some help. Where can I get some information on foam tire shore readings(colors)? Pink, purple, green, white, etc. Which is which? Which one is harder, which one is softer? And where can I find some soft foams for dirt oval racing that will fit a mini-T or a mini-slider? Always been a buggy tire cushion track guy. Now I'm involved in the So Cal dirt oval series and by the time the Main Event came the track was like adobe. Never been spanked so bad! Any help would be greatly appreciated.
Thanks,
Rich

[twisted]

i just won some tires at redneck rc. they are different from what ive seen o far for the mini t/slider cars. they are made by r/t racing tires.