Tire question 225/35ZR19 vs. 235/35ZR19

Yes but I just snagged my fender lip again on the passenger side when I went back in, over my driveway ramps yesterday afternoon. I took a wider angle and went a little faster than normal. Heard it squeak on the tire and thought it was the under tray on one of the extra 2x4s I use with my ramps. When I go slow it's been fine. Only happened twice over 4K miles since July. I rolled it back both times with a 2x4. Considering getting them rolled but will wait till spring. Better grip and balanced sidewall on my wider OZ wheels is great too. I can actually go wider in the back but decided against it this time around. 8.5s front 10.5s rear.

 

235's front and 295's back will be my choice when I need tires. I like the idea of a little more sidewall. I have certainly noticed how much harsher my 430 front is than my old 360.
225/35 versus 215/45

 

No dice. The Challenge Stradale front rims are also 7.5" wide. You need 8" wide rims to fit 235/35R19 tyres. You can do this with Scuderia rims as they are 8" x 19" in the front.

 

The 430 does not suffer from the same fender catching issues as the 360. At least to to my knowledge.

 

Ok thnx. Forgot it's a 430.

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I thought heaps of folk ran the 235 on the front of the 430?

 

I have 235 and not noticed any issues - ABS/ESP or otherwise.

 

Many do - just not on stock 7.5" wide rims. However I also guess a few run them on 7.5" rims, but don't. The tyre bead won't seat properly on the rim. Let's say you go for a spirited drive or track your car. If that tyre rolls on the rim while you go through a turn, you got instant tyre pressure loss and you're a passenger for the remaining seconds of the drive.

It's up to you to say whether it's worth it. To me? Not in a million years. I've seen it happen, no thanks.

There's also that little matter of insurance. If you lose control of the car, they will likely check your tyres. If they find out that they are mounted on rims they were not rated for, chances are good that you will be held liable.

 

235 on scuderia rims, no issues. less understeer and less harsh ride than stock 225

 

Like DK said, Michelin recommends 8-9.5" wheel width for 235/35 19 MPSS tires. If using another brand, look in TireRack's spec page for the tire you want to use. It gives recommended wheel width. Pirelli, Bridgestone, and Michelin recommend the same wheel width for the 235/35 19s, minimum of 8", maximum of 9.5".

Scud 8" fronts work fine with that tire size.

 

I run 235 Bridgestone RE-11s on my F430 with the option Challenge wheels (which I assume to be the same width as the standard 5-spoke). I've experienced no issues. Nothing but grip, in fact.

 

That does not change the fact that you have mounted a tyre on a rim it was never designed to fit.

It may work okay some of the time, but that is not the same as it is safe and advisable to do imo.

 

I run the same tire! Great tire for the 430

 

I'll grant that Bridgestone specs an 8-inch minimum wheel; I can't argue with that. However, there's quite a lot of empirical experience with this setup, with no issues reported as far as I've seen. There are threads here going back as far as 2011 (at least) regarding this tire. Look for user F430GT who had done a lot of research, including plenty of real road and track experience. A lot of people have been running this setup for years.

 

Well, I can tell you of a personal experience with it going horribly wrong. A few years ago, a guy who was an acquaintance to someone in our car club, joined our small group of friends for a track day in Sweden. He ran 235/35R19 on his 360 with Challenge Stradale rims. The tyre "rolled" off the bead of the rim through a turn and the car flew off into a wall. He escaped with minor injuries, but the car was a total write-off.

To me it does not matter if quite a few have no issues. If you're the one who has a blow-out, what does it matter what others do?

It's up to each and every one of us to decide whether or not it's worth it. To me at least, it's not. In my eyes, it can go wrong as I've seen it happen, and if it's the wrong time at the wrong place, it might hurt a 3rd. party.

 

I believe this is the first such report (at least that I've seen) on here. Thanks, this is very useful info.