Continental SSR3s on a 2013 BMW 520D M Sport, Rear runflats lasted 13500 miles with careful driving. Front wear lo but new shuddering ate motorway speeds. fronts been off and balanced and still as bad, tracking is perfect as done by a hi performance local company that does all expensive motors as it was not set up from BMW new when I got it. Wet grip on SS3s scary.. Driven for 30 plus years. Getting rid and going to non runflats. Beautiful car ruined by badly wearing runflats. 245 45 18 front and 275 40 18 rears.... Drives very straight and quick in dry, corners fantastic, grip is amazing,,, but when it rains... slow down to micra speed. Its so bad I don't like my wife driving it in wet greasy roads... My 120D has Turanza ER300 runflats and is so good in the rain !!!!!!! moving to Goodtyear Eagle Assy 3 as recommended by a local hi performance workshop.