From our Michelin rep stateside :twocents
Sticking down to the cords, sweet!!! That's quite a few laps on a big old RC-51. I'm told Willow is a lot like BIR, and both tracks are both hard on tires. The "C" spec may be the solution?
Michelin rep. says ...Why can't a Power One be flipped?
Michelin rep. says ...
Flipping the tire will show some tearing on the sipes as they are at the wrong angle for rear drive.
I did notice the air pressure mentioned they are using for the B rear is way over inflated. We race the A, B or C Power One's at 22 PSI