I like my kenda concept tires they are pretty tough kevlar bead and belting had em for 4 months without a flat and I weight 220 and ride with afull bag most of the time = 20 to 45 pounds

i.e. I ran over a broken beer bottle the other day left a whol int my tread about a 16th of an inch in diameter but no leakage didn't puncture the tube

I also skid throught turns I don't skid to a stop or skip tho

hopefully this helps later