Thanks! The tires seem to work well, I haven't gotten too hardcore crawling yet. The chassis is a Crawford Performance Barbarian. I took it to my usual clay track for a few laps in "short course" mode. It ran well with the rear steering locked down but the suspension was pretty stiff. I just installed the kit to relocate the shocks up onto the four link bar, this has made a dramatic difference in the jumping ability of the truck.