Given
53%
while driving a
BMW Z4
(225/45 R17 W) on
a combination of roads
for 20,000
average miles
Having put up with these for 20000 miles, I'm qualified to say they're the worst sports tyre I've ever driven, and fitting them to a Z4 is tantamount to sabotage. Tramlining and weave on anything but a really flat road is appalling, and the ride punishingly hard with no payback in handling. On the contrary, the hardness causes skitter on pocked or ridged surfaces, with the tyres seemingly in the air much of time! This simply doesn't compare to previous experience of the Z4 on non-runflats. Adding insult to injury, I have print-outs of the Press launch in 2009 of Bridgestone's third generation (3G) Potenza, which is supposedly better, but can I buy it to replace my worn out set? No... two YEARS later Bridgestone say it's available only on new cars, and BMW says it's never heard of it (despite supplying demo cars for the Press launch - how does that work, then?) Could it be they have a lot of the outdated 2G tyres to get rid of? Goodbye Bridgestone! On balance, and appreciating that conventional tyres might still be the ultimate, I'm sticking with the safety benefits of runflats and fitting the new Conti Contact Sport 5G SSR instead. It's so new I have no reviews, but they cannot be any worse.