I run a 275 front and just switch back to my 245 front for winter. It was remarkable how much lighter and more fluid it felt. There is no mistaking the grip from a wider front (though not as much as you would expect if sticking with the stock suspension), but I kind of miss that lighter feeling with more feedback. When the 275s wear out I will likely step down to a 255/275 combo.
GT3 RS | Desperately seeking the next great M car...