I took my sons out for a ride today on their new bikes. My son got a thorn in his MP's front tire. Before I just patch this thing up and move on, is there any much improved tire protection strips that I can get? His MP already weighs as much as a tank, so I'm not worried about weight. But I would like good protection that will save me the hassle of having to pull off his tank-sized wheels. Back in the day I used "Mr. Tuffy", but want to know if there have been any technology improvements like kevlar or some such sort?