Any of you all riding the new 5000s? One of the guys I ride with regularly started using them and has had 2 flats in last month. None in over a year with the 4000s he replaced. Another buddy gashed his 5000 on a section of road with very little debris. Wondering what any one else has experienced. I have a pair in my closet but kinda hesitant to use them when my current 4000s wear out.