This is on the "street" tires, not the DOT Drag Radials, we'll just have to keep on eye on them and hope they don't tear the bead off.
FYI, guys that strap the truck on the back of the rollers thinking "if it has to climb the roller it will hook up better and tighten the straps" are dead wrong!
Strapped down on the top of the roller works well when the tires are slightly deflated and for single gear pulls with minimal strapping or straps that stretch.
For maximum traction/shift spikes/simulated 1/4mile runs 1st thru 4th gear runs with heavy loading via eddy brakes, you have to strap down on the front portion of the roller, but have enough straps, correct strap angle, proper down tension, etc. to make it stay put and not stretch enough to come forward off the rollers and rub the ground.