bth you can get some of the foam blanks from sluggo slots on ebay. i have bought a few paks and made the silifoam tires. your also gonna want a mandrel to mound the tires on to shape/ ground,em to size. hope this helpa a bit
Looking for the tires which should increase the performance of speed, allot of tire which I was they just give a lazy to bike speed. There should be a unique technique in which they used foam and have not even a bit weight.