Just put the F1's on my Roadster and I think they are great so far! Last weekend we took our roadster to the wine country and at times hit 90+ on a winding road we knew was clear and they held the pavement great also drove around Infineo Raceway and averaged 87 mph for 2 laps no slippage at all!
The wife was driving the street part of the trip scary situation but she did great and she now loves the car!