didnt you see the site, with the foams, just destroyed, looks like it would eat them for breakfast and come back for more each run... rubber while it tears may (im not sure) hold up better... and ballooning = more speed :P
hyper 8.5 pro SOLD!
Monster Max Still Working...
JR SX3
Neu 1512 2D/S
12t pinion
4800 zippy-r