Never used before. Definitely improved riding after replacing worn out tire. Remains to see how they hold up. But so far good enough for me. Bikesmiths sent me tires in new condition and faster than I expected. Will be looking for replacement tires here again. Looks to me like Kenda is not continuing this product. I do not need the fastest tire. I need to cut costs, without cutting safety. So far looks good enough for my use as someone without a car, and a poor bus system; that needs transportation year round. I use mountain bikes in the winter months. Unfortunately bicycle tires do not last that long compared to car tires; so I need to look for good sales, preferably with some puncture resistance. Unfortunately these may not be sold in future years.