I use these tires on my Zipp 303, 404, and 808's. I do sprint, international, half ironman and Ironman races on these tires and have never had a problem.
I really like these tires. I have a couple hundred miles on them and so far they have been great. I am riding them on the 202's. They were super easy to install, did not need a tire lever to get them on. The rubber is nice and the ride is smoothe. I will definitely be buying these again!
Never had a problem with these tires. I use them on all my Zipp wheels. Race Ironman, international, and sprint triathlons. Fast and light.
