Originally Posted by
Brian Ratliff
I heard enough things about the durability of the PR3 that I skipped that generation.
Pro4s are an improvement in flat protection. After 1000 miles, the Pro3s would have slices and little holes all over. You didn't flat as much as you think you would, but it wasn't great by any means.
I think the Pro4 Endurance is the old Krylion. Plenty of reviews there.