I have the same comment as another review here, so I do not understand why that one gives just two stars - a mistake? Anyway... the tires my ebike came with were so thin that I kept getting flats from really small road debris. I replaced them with R4FTs and so far so good. They are also knobbier than the originals so not as smooth of a ride, and they are much stiffer so installation is a pain (use bigger longer tire irons - the little plastic bicycle tools are not enough). But not getting flats anymore is a worthwhile trade off.