Just wanted to give props to you for coming on here and actually answering fitment questions. Thats pretty cool of you. Im about to order a set of Strasse Forged wheels for my IS250. There is a discount tire 5 minutes from my house. You've got my business for the tires.You'll need to maintain 1/2" staggered tire diameter front to rear so I suggest 255/35R-19's in the rear. This size mounted on 19x9.5 +20 wheels will likely require the fenders to be rolled and possibly a slight pull. The front combination is fine.
Well you had my business anyway because anyone who sponsors Chad Reed im gonna support!