Hey everyone , I need some assistance on going wider tires on the front and rears on my 17inch rpf1's and I want to keep my
stock Fenders and (no)rear fender flares. at the moment I have a 225/45 & 255/40 on a 17x9 & 17x10. I am looking in to either going 245/40's or 255/40s in the front and if possible a 265/40 in the rear. anyone do this type of set up on stock parts, I have all 4 fenders rolled and the rear bumper taps relocated.

second question for the fronts should I be going 40's or 45's? will the 45's help on closing up the wheel gap? or will that only push the vehicle a tad bit higher and change will be noticed.

If for any reason I cant fit a 265 in the rear, than I will be sticking with a 245 in the front, but I will still have to decide if 245/40 or 245/45
off set on wheels is +45 for the fronts and +38 for the rears and I already adjusted the coilovers height for a bigger tire.

 

You want 40's to keep as close to the OEM diameter as possible. If you want to "close the wheel gap" lower the car. For the front a 245 would fit best on the 9 inch wide wheel. If you have stock fenders you will need to pull them a bit and possibly run more camber. For the rear the offset is +38 anything wider than a 255 will require overfenders or to much camber. Hell even a 255 requires more camber than is really ideal. If you have overfenders or something please mention that as if changes how things will fit.

 

Thanks for the info, so I guess ill be running 245/40's in the fronts and the rears will stick with 255's. I even lifted the rears thinking a 265 would fit, with only a roll/pull and bumper tab relocation. I don't want more negative camber , I just want more tire on the ground. Since I can't fit more tire in the rear, ill just have to stick to buy a more aggressive/sticky tire.

 

Would a 17x8+44 235/45/17 and 17x9+44 255/40/17 fit well? tires would be advan ad08r's. my goal is to have a non staggered meaty track setup for my ap1.
stock ap1 is 205 front and 225 rear. because of that i chose the 235 front and 255 rear to maintain a similar stagger to oem. and also, a question that has been on my mind, why is the sidewall on the front 45 and the rear 40? is there a reason for a taller tire in the front?

 

Wow where to start. If your goal is a "non staggered meaty track setup for my ap1" then why do you still have staggerd wheels and tires? Non Staggered means you have the same width wheel and tire on all 4 corners of the car.

Next if you do go with those wheels you will need to roll the fenders and relocate the rear bumper tabs. Read other stickies in this thread for more info.

For tires on those wheel I would do with 225/45/17 in front and 255/40/17 in the rear. The 235/45/17 is an oddball tire size and taller than the oem sizing.

Finally the second number in a tire size isn't a measurement it is a percentage. Read it like this 225/ 45% /17. The percentage is of the width (the first number). Therefore in order to keep a similar sidewall on a narrow tire the percentage is higher on the narrow tire and lower on the wider tire. The 225/45/17 is 101.25 the 235/45/17 is 105.75 and the 255/40/17 is 102. See how the 235 is a higher number? The sidewall will be taller on that tire than the rear tire.

 

I'm sorry, i meant staggered

too many late nights of studying, lack of sleep, and this is what happens...( i meant staggered)

thank you for the clarification on the sidewall Manga_Spawn.

 

Searched through this thread and couldn't find info on a set-up that I am trying to achieve. Saw a couple posts in different threads where information is either, "yes" or "will need more modification" etc. Hopefully somebody here will have a more confident answer.

I have 17x9 +42 wheels. I'm lowered about 1.5-2 inches (see pic). I have my fenders rolled professionally so they're pretty damn flat, the rear tabs were relocated.

I am certain that I won't have any issues with 255's the rear, however, i'm wondering if I can also run 255/40/17 up front without having to pull my fenders, as i'm unfamiliar with this process would would like to avoid it if possible.

I keep reading that the common rpf1 17x9 +45 don't have any issue with 255 up front with a roll, but half of what i'm reading is saying +42 wouldn't really allow this.

Here is a picture of my ride height on stock 16's. Thanks!

 

You'll likely need to pull the fronts a little for the 255. The +45 17x9's usually need a slight pull as well. You can run a 245 which will allow a little more space in the front. You can run more camber to compensate but you will likely need -3 in front. I had 17x9 +42 with a 245 in front and it needed a pull.

 

Thank you, I decided to go with 235 up front. Hopefully this is that sweet spot which will allow for perfect fitment without being pulled. If not, I'll start googling how to pull fenders lol.

 

You pull them the same way you roll them. You just keep pushing them out with the roller. I am sure whoever rolled your fenders should be able to pull them a little.