Bought these to replace my Michelin Pilot Sports, 220 treadwear rating, that I loved but only lasted 14,000 km ( 9,000 mi). Hope that with a 280 rating they last more than 2 summers! These tires don't quite snap as sharply into a curve like the PS's did, they generate a small squiggle on the back end as load builds up. I am learning to trust the back end with them, not always easy in a 911, but love them a bit less. I guess that's the trade-off to the treadwear, and slightly lower price.