Quote
aired down to about 15 psi.

down to about 18 psi

So... when did you air down? My old MT/Rs LOOOOVED 9 PSI. I run my current 38.5s anywhere from 4 to 9 PSI, 9 if the trail is fairly easy. 18 PSI is my **street** pressure. <img src="/forums/images/graemlins/smile.gif" alt="" />

Try your MT/Rs at 10 PSI sometime. The difference will amaze you.

EDIT: I just noticed he has a diesel. No wonder his BFGs were sucking... BFGs only clean when you spin them about eleventy-billion RPM. Diesels aren't too fond of that.