I've spent a good bit of searching but have yet to find much definitive information on the topic. I'm thinking of getting either a set of 949 6UL in 17x10 +52 or Advan RSII 17x10 +50 wheels and running RE71R 255 wide. Some people seem to say that it can be done with just rolling the front fender flat and some people say you need to flare the fender 20mm. I'm planning to get a set of lowerball joints, probably offset. I'd also be open to running adjustable upper ball joints between which I would have a good bit of adjustability in track width/camber to move the wheel around a bit. Planning on getting a set of Ohlins DFV dampers as well.

Anyone have any experience on fitting similar wheels on the car?

While we are at it same question on the rear but from what I've heard it shouldn't be as difficult to fit?

 

The rear is no problem with the standard fender roll AND bumper tab relocate, for either wheel option.

For the front, I run a 10" +58 with a 3mm spacer, so +55 with 255 and have my front fenders pulled a good 12-15mm to clear without issue on the track and general ease on the street, but still have to be careful having wheels turned to far when hitting entrances etc. I run -2.5 camber. So with that, yes an aggressive 20mm pull is what you can expect to do up front. Id go with the +52. Every little bit will help.

 

Do you run offset ball joints on the upper or lower? I feel like the upper offset balljoint could help as it pulls the top of the wheel in (vs the lower pushing the bottom out). I'm currently running 17x9+62 PF01ss on stock coilovers and 255 with unmodded fenders without issue

 

Im running no aftermarket ball joints. One issue you will face with running an upper joint is inner rubbing on the fender. I had issues with this at +58 and my ride height of 13" hub to fender. I hammered in the inner upper fender ridge a few mm to help some and added 3mm spacers to increase the wheel offset. +52 is really the ideal offset range for a 10"/255 combo up front to not have inner clearance issues, but you have to be willing to pull the fenders a good 20mm as mentioned. Its not a big deal, the fenders are thin, I just it with my fingers. Your going to need to go a little more aggressive so a fender roller may be needed.

A 10" wide rim does provide the 255 with an ideal contact patch and sidewall profile to exude the most handling precision and traction out of the tire available. However if your concern is pulling the fender, then I might suggest a 9.5" which would be hardly a downgrade. Running it at +60 would center it between the two fender lines about the best possible as to not rub the inner fender and if your lucky eliminate most the need to pull the out fender. But thats as close as your going to get to the inside without having issues. I question your ability to not rub the inner factory coilover with your current fitment. Are you on lowering springs? You must be, as this actually increases your inner control arm clearance as well as coilover if you are still on the fatter factory ones. I should warn, moving to a 9.5 +60 I believe will indeed rub on factory coilovers, so you would need to move to an aftermarket option at that point along with the new wheel set no matter if you choose the 9.5 or 10" option.

With your current 9 +62 as a baseline. The 9.5 +60 will decrease inner clearance by 5mm and outer by 9mm. 10 +52 option will decrease inner clearance by 2mm and outer by 22mm. Just to give you a visual when you poke around the car with your measuring tape. Naturally given this, the 10 +50 option will be the same as if you pushed your current wheels out a full inch.

 

Ive got a 10" +44

J's lower ball joints

-3.3 camber

Fenders rolled only, no pull. The car is low can't fit a finger in the gap. I run on 900lb eibach R2 coilovers.

Zero issues with rubbing. I bet the +52 would fit with less camber if needed, however check clearance on the A-arm at full lock. I can't remember if that comes into play with that offset.

 

So here is were the confusion starts, ddess is running +44 offset with just rolled fenders, s2000junky is running a higher offset +54 and has his fenders flared 12mm. Is the clearance from the extra .8 deg of camber enough to negate the extra +10 offset and 12mm of fender flaring? junky, what spring rates are you using up front, could it be that ddess is just so stiff that movement is reduced?

 

Im running 17x9.5 +44 all around and have TONS of clearance. Could easily mount 17x10 +44. No rubbing ever.

900lb springs in front. -3.5 camber front. Im using upper ball joints


Here is my car parked next to ddess at streets of willow (ddess on left me on right). Im not sure how many mm my fenders are pulled but the flat part of the front fender is completely gone.

In the rear its just rolled completely flat and tab relocated. Im running -3.25 camber rear on 780lb springs.

 

I've ran 17x10 +62 6ULR wheels (w/spacers) on 275/40 tires w/ASM style fenders.

 

Good info here as I'm looking to replace my square 17x9 RPF1 setup with a square 949 6UL in 17x10 so I can go a bit wider while clearing the Urge AP Racing BBK I'll be getting. It doesn't sound like there will be much of any issue.

 

-2.5 to -3.3 camber difference id say is right about 5mm. Where the rest of the clearance he is getting I am not sure, unless he is going with some hellaflush set up. I assume he is running a standard width extreme summer 255 or he wouldn't have bothered to chime in? I dont see where a lower offset joint would offer anything clearance wiser over stock.

Im running factory 01 sway up front and 14kg springs.