I've been running 255/40/19 on the rear for about a year.

One more mpg on the highway and a softer ride.

Ray

 

Anyone know if 295/30-19s will work???

 

It can be done - 295/30-19's on stock rims. The tire guys really had to work them, but there they are. Maybe not an "optimum set-up, but cool looking for sure.

 

Blackjax, thanks for the response, they do look pretty good, but I think I will stick with 275's as I do not trust anyone around here to mount them correctly LOL

 

After reviewing the valuable experience shared here, I just ordered my stock wheel tire replacements:
F: 235/40-18 - curious to see how much rubbing will occurs
R: 275/30-19 - needed to sign a waiver as it is "2% more than recommended size"

Thanks for being my Subject Matter Experts

 

Laitsabr - you will not have any rubbing issues, but much more grip and lots better looks, enjoy the new rubber and let us know what you think.

John

 

I have c295 30 19s on mine. If I had not lowered it, I don't think I would have the rubbing issues that I'm having.
A WORD OF CAUTION! Just because the "size" is the same, it does not mean that two tires from different manufacturers will be the same width! My 295 30 19 pirellis are about 3/4in. wider than my 295 30 19 contis. Needless to say this did not help my rubbing problem!



These are the old Conti's. I had to take off my 20mm spacers and drop down to 12mm to keep the Perelli's from rubbing on the outside of the fender.

 

Tires arrived, and just got them on at Costco.. GREAT!
Drives and grips very well indeed, as 05XF-LVR advised, no rubbing at max turning radius. It does look very nice indeed, more aggressive, I would venture to say... Seems quieter too, but had the top down, so cannot really tell yet. It was a joke to the techs when they saw that I had 2 left tires in the rear... Wonder if the previous owner knew...

OLD: GoodYear F1 A/S
F: 225/40-18
R: 255/35-19

NEW: Michelin Pilot Sports A/S Plus
F: 235/40-18 (36psi)
R: 275/30-19 (36psi)

 

I just put the same size tires on mine. Bridgestone RE760 Potenza Sports.

I must admit, tho, that the 30 aspect-ratio tires on the rear (OEM is 35) look a little silly and too low-profile paired with the 40 aspect fronts.

Also, the fronts are taller than OEM and the rears are shorter than OEM which, in sum, alters the balance of the car more than an inch ... throws the headlight aim into the sky. Not sure what it does to steering yaw. When I do it again, I will either maintain the 40F/35R aspect ratios or drop BOTH ratios to 35F/30R, regardless of the wider tread widths.

In theory, the widest tires that you should safely attempt to mount onto the OEM 7.5"F and 9"R rims are 255/35R18 fronts and 285/30R19 rears. The tires are wider, obviously, but very, very close to OEM tall. This set should look awesome, and the only difficulty might be some inconsequential rubbing of the front tires against the rearward of the front wheel well at full turn lock. CAUTION: any fatter or taller and you could rub on the upper control-arm nut (I think that's what it is) fatally. Very few manufactures produce BOTH of these sizes ... I believe a couple are Kumho Extensa's and Bridgestone Pole Position's.

If anyone gets a set like this, let us know how it looks.

 

i am also getting some Re760's but only the back in 275/35/19.

 

This was the tire and size I wanted for the rear ... but was told they wouldn't be available until October. Went ahead and bought the 30's.

Please let me know if you find out differently.

Thanks.

BTW: The Bridgestone RE760 Sports are absolutely the smoothest and quietest riding tire you're going to find for the Crossfire. Makes the Conti's feel like pencil erasers. The 760's make you feel like you're driving a much larger car, and the performance ain't bad either. The only downside (if it matters) is that the sidewall-to-tread shoulder is a bit more rounded than most sport tires ... doesn't have that defined 'slick' look ... but fine by me. Probably why they're so smooth and quiet.

 

can you run 255 35 r19s in front? I know there will probably be rubbing but will it be dangerous?

 

You would probably shred the tire against the upper control arm nut running something this tall and wide (26"X10"). Are you sure you meant to say 255/35R19?

 

yeah I did mean to say that, I figured it was too much. I just found some pretty sweet 19's with newer tires already on them off of an sl500, I think. I was just hoping I could make them work somehow

 

Take it from me, do NOT buy something because it is a good deal or because you fall in love with the wheels and then 'try to make them work'. It has cost me a lot of money and time to make my 20's work and they came off another XF. Not trying to be your dad or anything LOL, but do your homework and make sure everything is within spec because the tolerences on these cars, especially when it comes to wheels, are next to nothing. Just my $0.02

 

yeah, I appretiate your input and after sleeping on it I did decide against it. I found a new set that will need a spacer for the rear (19x9.5 with a 34mm offset) but other than that they should be a great fit. what would you guys recommend for a spacer on that wheel anyways 10mm? 15? dont mean to hijack this thread but any help would be great

 

Did you read this sticky, and use the tool?

https://www.crossfireforum.org/forum...ment-tool.html

 

Stay with as small of a spacer as you can and still have the look / fitment you desire. You are essentially stretching out your axle and that puts unnecessary stress on the suspension and hub bits, so the smaller the better, I am running 10mm in the front. You may not have to run them at all, as there is much more room in the rear.

I would DEFINITELY do a good hub centric spacer, not some cheap chinese ****. I am running Eibach Pro spacers, as with many other members, kid of expensive ($100-$150) but you get what you pay for, right??

 

i run 285/35/19's on the back with no problems at all

 

I am running michelin pilot plus 255 40 19 with no problems. and they ride great. They really took some work to fit the taller 40's but they will fit