Originally Posted by
gregjones
I've been hoping to run across the reason somewhere. They grind on the sidewalk walking into the store, but don't leave a mark on the floors inside. Mine, last years version of the
RT-82, grind with equal enthusiasm on asphalt.
They don't grind on smooth concrete indoors. I think it's the grit on top of the concrete that's actually grinding. FWIW, egg-beater style cleats have a lower profile and almost no grinding, but I ended up not liking them for other reasons.