Originally Posted by Rhys Jones
That diameter will likely rub on the vent at the front of the wheel housing.255/40- 18 should work but will increase your speedo error.I tracked my car on stock tires at Grattan and felt it could use more grip all round but esp the rear.If you want square and no rub I'd go 265/35-18 in toyo r888.
Harold at Hpashop.com sells those wheels and is probably your best authority. Contact him
With enough camber, 265/40-18 may fit.
FWIW, I run 265/35-18 in front on track and have ordered some 275/35-18s in front (with 295/35-18 in back) for this season.