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I'm planning to ditch the stock RFTs and upgrade to either the new Michelin Pilot Sport 4S or the Conti Extremecontact.
Rather than go with the OE 225/45/19 and 255/35/19, I am considering going up to 235/45/19 and 265/45/19. Visually it looks like the car would be fine with a little more tire width. I'm not lowered.
Has anybody played around with plus-sizing tires on the C43 (whether or not on the OE wheels)?
1. The 255 is the widest recommended tire size on a 8.5 inch wheel
2. you could go to a 235 in the front
3. 265/45 would not be the appropriate sidewall if you were to upsize the rear. You would want to stick to a 265/35 and even a 265/30 would work, but the 35 is closer to the OE rolling diameter.
1. The 255 is the widest recommended tire size on a 8.5 inch wheel
2. you could go to a 235/45 in the front
3. 265/45 would not be the appropriate sidewall if you were to upsize the rear. You would want to stick to a 265/35 and even a 265/30 would work, but the 35 is closer to the OE rolling diameter.
What he said, but in the front 235/35. It's the max you can fit in the front. The rear can fit 275, but do not exceed 265/30 on the OEM wheel.
Improper fitment will screw your traction control, speed reading and of course mileage
Basically 265's work on an 8.5 inch wheel but it isn't recommended.
Some issues you'll encounter:
More sidewall flex
Contact patch not actually increasing
Bulbous tires
Potential rubbing (on inner suspension, however I don't think you'll have that problem.)
1. The 255 is the widest recommended tire size on a 8.5 inch wheel
2. you could go to a 235 in the front
3. 265/45 would not be the appropriate sidewall if you were to upsize the rear. You would want to stick to a 265/35 and even a 265/30 would work, but the 35 is closer to the OE rolling diameter.
Thanks, I had a typo in the sidewall in my post. OE front size is 225/40/19.
It's my understanding that 265 is perfectly fine on an 8.5" wheel, though it is at the upper end of the limit. Is that not true?
Ultimately the car isn't really lacking for grip so the 255 rear is probably fine. It would be nice to get a bit more tire up front though.
A 265 rear tire will give 0.5" more contact patch using a Michelin PS4, over a similar 255 while fitting basically the same rim size profile.
Not a lot for the price.
Others may vary.
A 265 rear tire will give 0.5" more contact patch using a Michelin PS4, over a similar 255 while fitting basically the same rim size profile.
Not a lot for the price.
Others may vary.
That's not how it works when you're fitting a tire too wide for a rim though. The tire will pinch where it meets the rim, basically resulting in a near identical contact patch.
I have ordered 235/40/19 and 265/35/19 PSS for wife's sedan. (basically up 10mm all around) Will be in next week. I'll let you know how it goes. I am willing to back down to original size if need be, but I am told will work and look better. Not really concerned about increased performance so much, just can't wait to get those RF's off the car before it rattles itself apart.
I have ordered 235/40/19 and 265/35/19 PSS for wife's sedan. (basically up 10mm all around) Will be in next week. I'll let you know how it goes. I am willing to back down to original size if need be, but I am told will work and look better. Not really concerned about increased performance so much, just can't wait to get those RF's off the car before it rattles itself apart.
Love to see a pic once you get them on, if it's not much trouble!
Got my PS4S ordered last week and having them installed next weekend. I thought about ordering 235 and 265, but the front has very little give for room and I didn't want any rubbing. I stayed the same size since performance would probably be best if the tire size ratio was kept the same (not increasing just the rear wheels)
I had the Michelin Pilot 4S mounted today in OE sizes. Too early to really evaluate performance, but the ride quality of these is lightyears beyond the OE Pirelli RFTs. Comfort mode actually feels like a comfortable luxury car now, and I don't have to drop out of sport on broken pavement. Based on that alone I'd advise anybody to ditch the RFTs and get some decent performance tires and a fix-a-flat pump.
I'm also glad I stuck with OE sizes. Like the PSS, the 4S seems to run wide for its size. Especially up front I'm not sure if I would want more rubber.
So... Got the 235 and 265 PSS mounted today. Fit by the slimmest of margin. The front is literally 1/8 inch from rubbing the control arm (I think that's what it is). The rear is fine. No rubbing so far. Drove about 10 miles over different road conditions and all good.
FYI, some here were saying that the 265 was too large for an 8.5" wheel, but the tire shop measured the rear wheel at 9.5" and the front at 8.5". I do think the 225 looks more natural in some ways on the front wheel but the 235 isn't much different and looks more aggressive. I think either is fine, so long as the upsize continues to test out OK.
BTW ride is so much better even at the 39 lb pressure the shop inflated the tires to.
So... Got the 235 and 265 PSS mounted today. Fit by the slimmest of margin. The front is literally 1/8 inch from rubbing the control arm (I think that's what it is). The rear is fine. No rubbing so far. Drove about 10 miles over different road conditions and all good.
FYI, some here were saying that the 265 was too large for an 8.5" wheel, but the tire shop measured the rear wheel at 9.5" and the front at 8.5". I do think the 225 looks more natural in some ways on the front wheel but the 235 isn't much different and looks more aggressive. I think either is fine, so long as the upsize continues to test out OK.
BTW ride is so much better even at the 39 lb pressure the shop inflated the tires to.
Sounds like your tire shop doesn't know how to measure a wheel.
Yeah, probably not. I told them it was 8.5 rear, but I didn't want to argue with them, just wanted the tires mounted and be on my way. I was asked to send photo. Here is the 265 mounted.
Yeah, probably not. I told them it was 8.5 rear, but I didn't want to argue with them, just wanted the tires mounted and be on my way. I was asked to send photo. Here is the 265 mounted.
Looks good to me!
any pictures of the whole set-up from either of you gents?
I had the Michelin Pilot 4S mounted today in OE sizes. Too early to really evaluate performance, but the ride quality of these is lightyears beyond the OE Pirelli RFTs. Comfort mode actually feels like a comfortable luxury car now, and I don't have to drop out of sport on broken pavement. Based on that alone I'd advise anybody to ditch the RFTs and get some decent performance tires and a fix-a-flat pump.
I'm also glad I stuck with OE sizes. Like the PSS, the 4S seems to run wide for its size. Especially up front I'm not sure if I would want more rubber.
Tires look good.
I wonder how they will do in the mileage department.
Got mine installed yesterday. I gotta say, it might be the best mod I've done so far. I actually thought I was driving a loaner C300 at first because of how much smoother it is compared to the garbage P0's. Definitely worth the price. Perfect amount of road feel, noise is muted, and grips like a **** around corners
03-13-2017, 01:00 AM
