Can we run 255/45/19s on the front of a 2015 4matic.
 

Well I got the wheels now I have to choose tires, I went with 19s. I'm happy finally but now I need to choose a tire. I'm going with the pilot sport as 3+ but instead of the usual 245/45/19s up front and 275/40/19s in the rear I want to go with 255/45/19s and 285/40/19s but I don't know if they will fit. Looking to the board for answers.

Click here to use a tire size calculator. It will tell you how much of a difference the new tire will make. According to the calculator, a 275/40/19 would have the same diameter as the usual 245/45/19. The size you wanted (255/45/10) would increase the diameter by 1.1% and increase the sidewall by 4.4%. You would also need a slightly larger wheel sized 19 x 8-9.5" according to the calculator.

I made a post based on 20s and a purchase I was considering, this post was based on an actual purchase. I still don't know if it will fit but now I know the percentage difference based on the 1010tires but the percentage does not let me know if it will fit.