I took the dremel with a cut off wheel and sliced pretty much all of the tread blocks atleast once. some across and some length wise. I took the slash out to my track and threw on a pair of stock losi xxnt rtr rear tires for a lap or two just to see how they did. With those tires I could drive the truck as hard as I wanted and the rear end was controllable, wheelbase just a tad to wide but they could be run they would just burn some paint off the body but no extra noise from tire rub. Bowties might be to much bite and cause a push I thought. I unbolted the losi tires and put the modified stock tires on and tried them. They performed much better. I still had to watch what I was doing in some of the corners but other corners I could get on the gas hard. I believe that under normal track conditions (for my track)with some moisture and other trucks tearing up the soil a little also that the grooved rear tires will work fine. Side note, I guess its time for a new pc as my losi xceleron software is for windows xp and I have ME, I really want to play with that throtle curve.