Perry
Active Member
I agree that if wider tires are the main goal for grip not efficiency the 19x9.5 +35 on 265/35 19 tires is probably the best and they would fit both in front and back. This would have them 22mm closer to the fender and only 10mm closer to the suspension which would clear since that is less than 1/2 in. That would also keep the total wheel diameter closes to stock at only 1mm deviation (smaller). 275/35 19 tires on that same rim would be cutting it too close in the front with 15mm closer to the suspension which is the entire clearance.I was thinking of the rim size that is currently tops in voting, my understanding based on the poll is that the 19x9 at 35 ET was the most popular. I do think the 9.5 is a better fit for the tires I want, 10 also possible but I am not sure I want to add metal to the rim without some benefit. I think the 10" width will make the tires look more "Square" but honestly the 9.5 is probably pretty close, and I'd prefer a bit of rubber protruding past my rims, rather than the rubber stretched over a too wide rim. Looking at the Toyo tires website, 9.5 is the recommended rim width for both the 265 and 275 section.
Rim width is a compromise for either the wider or narrower tires either way, since in the 19x9 size you will likely either go stock tire size, which will be stretched looking on a 19-9.5 wide rim, but will fit, or you go with the 265/275 size, and its at the lower edge of the 9" wide fitment
If you go with 19x9.5 wide rims, then the stock tire size is on the low edge of fitment, and will look stretched. 9.5" wide is the ideal size for the 265 or 275 section.
Overall I think more folks buying performance rims will be looking at wider tires so making the 19x9.5 at 35 or 40ET is the better option. However more tire will reduce range somewhat. Tesla owners hate that lol. I wonder what percentage will stay with the stock tire size even with the upgrade rims?
10" rim seems to wide, it also wont fit the stock tire size at all, so even if it could physically be mounted It would look silly stretched.
Although all this agonizing over sizes seems like a lot, rims and tires are one of those most important choices on a car. Now is the time to get it right.
Now I know Sasha and others have said that for handling, a square setup is the way to go but can someone explain again from a technical standpoint why that is?
I ask because going as wide in the front as in the rear also screws up the scrub radius. The setup described above would cause a positive scrub radius of about 5 mm. This may negatively affect the car's handling. So staying with stock width in the front may be the safer but the rears would not have to since they don't turn hence no scrub radius issue.
Another question I had is even assuming a square setup, it it bad to have the rear track wider? The rear wheels have a 10mm grater fender clearance than the front so going with 19x9.5 +35 front and 9x9.5 +25 rear would make a more even flush look between front and back. Is there an issue with wider track in rear from a handling point of view?