thought it was to do with wearing the astro out???
sucks either way.
I don't use them, but I don't agree with tyre rules/banning etc. It just seems silly.
tyres............ there round, there rubber, there a model car. its about fun and racing, tyre rules just screams of restrictions and stupidness.
I only run what's allowed anyway, but I do not agree with banning certain tyres as it effects astro, or some stupid rule some track or another says so.,.............
But I am not one to follow rules................
