These came fitted from factory and from the start I couldn't wait for them to wear out so I could replace them! I've never experienced a tire that gave such an awful ride, yes I know they're run flats so are a lot stiffer but these rattle you and the car to the core on each journey. I found they had high grip levels in the dry and coped well with varied levels of power put down, they did take a while to heat up though. Wasn't so confident in the wet if I'm honest, often felt the rear slide even under normal driving styles. Grip lasted until about 3mm, fine in the dry but in the wet expect to have the back end stepping out without trying, most of the miles were on the motorway which contributed to the decent wear rate. I'm a HGV driver so don't thrash it around. Another negative is the price of these, simply outrageous really. I've had normal tires on for the past 2k and I recommend this move to anyone debating it, the car feels so much better and has a vastly improved ride quality.