[jhautz]

Originally Posted by lincpimp

I have a set of the imex foams, and they look like the best bet for speed runs. They do have a 14mm hex, but are a decent height.

http://www.imexrc.com/servlet/the-25...M-GREEN/Detail

Linc, These things tend to blow up once you start to get in the 60 mph range. I blew a few of these off the rims with a setup that was thoretically only good for mid 50's. The foam on these is rather thick and tends to rip the foam down near where its glued. Once tit goes.... it goes! Shrapnel all over the place. Im sure you could get higher speeds from them if you cut the foam thickness down so there would be less weight in the foam and they wouldnt tear. But then tire life wouldnt be very long.