just to let you know i've run goodyears nct5's on my 130i for most of its life as i've found the wear on these has been exceptional, last batch, i wasn't too pleased with and the NCT5 tyre technology is so old, so after many days and nights of research i switched my rear sets to the conti sport contacts ssr 5, and driven those tyres back to back... and I'm very impressed with the Dry and Wet linear acceleration and grip of these conti's. Obviously when you pull out of a minor road on to a major road to get up to speed if you floor it as your turning you will get some wheel spin as in all BMW rear drive cars, no matter what rubber you have. But i have found the conti's to be pretty comfortable, but a little nosiey above 50 MPH. I cant comment on wear as i haven't driven enough miles. Its -2.5 Degrees today and the tyre grip is still exceptional. The biggest thing i like about these tyres is the confidence in the wet going into a bend, which is great, as in england the roads are always damp in the mornings... :) There is a lot to be said about tyre technology and it has come on a lot since the original run flat tyres were released, this is evident in the compound and wet & dry grip on the conti's.

These tyres were standard fitment on my car from new. I've just replaced the rear tyres after 17,300 miles with 2mm of tread left. After looking at other run flat options I decided to replace the tyres like for like since I have been very pleased with the ride quality of these Continentals. In the past I owned an e90 and the ride with run flats was very jingly. However the ride quality of the f31 with these tyres is excellent and therefore I didn't want to run the risk of spoiling this by changing tyre brand. I have also found the car very stable with these tyres - in wet conditions, even at speed, the grip levels have always been excellent.

I had a set of 225/40R18 CONTI SPORT 5 SSR Runflats on the front of my Mercedes from new - great grip in the wet and dry but terrible mileage!

I work in the tyre industry for a living and although Conti have a great OE share within Europe (30% apparently) their replacement share is one of the lowest out of the Premium brands.

There is surprisingly little tread depth to start with! Hopeless when accelerating in the wet: Rear-wheel driven care feels dangerous due to little or no grip. Very hard compared with non-runflats making ride unpleasant on London's poorly maintained roads. Fine on dry, smooth roads but most modern tyres would be.

I have installed two new tyres at the front side for one week.Everything feels similar compared to the Pirelli P-Zero which is at the rear side. One thing that I am surprised is the tyre depth is only 6mm when new! I am not sure how long they will last.

Only run these 1000 miles so far on a Z4, but find them a huge improvement over the dreadful 2G Potenza - bearing in mind Bridgestone refuses to supply its supposedly improved 3G tyre for after sales. This new Continental feels more planted and progressive, without the weave, tramlining and neurotic behaviour of the Bridgestones. The Continentals handle and ride far better, though at slightly softer pressures than the Potenzas. Run at BMW's higher pressures (fine for track days, not for today's crumbling "roads") the Continentals can be painfully hard too. Too early to judge wear and other factors but, having decided to stick with runflats (not everyone's choice, I know!) it was a good move to dump the 2G Bridgestones. Can't vouch for the 3G - I can't buy them!