BMW E90 330i M Sport Tyres

Fronts are 225/40 R18Y. I recently changed the OE Bridgestone RE050A run flats on my BMW for the SC3's. I'd read about the differences people had noticed, but still wasn't prepared for quite such a transformation. Immediately noticed they were smoother, quieter, less 'crashy' over pot holes and (cursed) speed bumps. Much more feel in the corners - the run flats almost "lock out" once the shoulder gets loaded up in a corner, and any bumps in the bend will be transmitted through to the wheel. Not any more. I've not had them long, so this isn't a thorough review, but I'm 100% pleased with my choice and definitely would choose these tyres again. Run flats just aren't there yet IMHO. I'd rate these SC3 on a par with Michelin PS2's - these feel better on wet roads, and not quite as good in the dry.

were on my car when i bought it and have to say very very impressed superbly grippy on dry or wet , as usual for a performace tyre they wear very fast . but if you dont know that before you buy them you shouldnt be buying them , overall excellent and i would buy again

Front tyres are 225/40 R18W. I'd heard about run flats being hard. I hadn't quite expected them to tram line so badly (lorry grooves on motorways, uneven country roads, esp when wet, off camber straight roads). At times the wheel gets pulled from your grip nearly - as someone else noted. Tracking and wheel alignment were all fine in case you wonder, but when I changed the tyres (after a decent 29000 miles), the shoulders were really badly warn (down to 2mm or less) but the centre had maybe 5mm left. Some of this could be underinflation (but I check fairly often). Others have pointed out the hard sidewalls cause high shoulder wear, which I can believe. I've changed tyres for Conti SC3 all round (not RF) and it's like having a different car. Much smoother and tramlining is mostly gone. I've sacrificed the run flat safety/convenience, but I don't think the technology works well enough yet. Bridgestone have announced the 3rd gen of run flats with less rigid sidewalls, so that might be worth a go in the future, but I don't like this generation one bit.