Thank you for posting that chart. I was just headed to their website to see if they had something like this.
Does anyone know if someone has run something bigger than a 285 on the OEM narrow body wheel?
Any complaints ?
I would say a large percentage of people run 305s on the stock wheel. They will also say they're great, no complaints.
But they're kind of math dumb, because the contact patch on the stock wheel maxes out between 275 and 285, so anything wider is 1) not going to ever touch the ground, and 2) cause the car to skate as the patch shifts under traction. So, while they may have no complaints, their butt dyno is lying to them. Most people post reviews on their tires in the first 1,000mi when the tires are still super sticky. Once the new tires break in, their performance should be slightly worse than the OEM tire size (again, skating and reduced down pressure coupled with just a tiny bit more added weight). Of course, you would get better performance with a Michelin PS4S 305 vs. a Pirrelli summer 275, but you'd also get quite a boost on a Michelin PS4S 275 over the Pirrelli. That's only because the part of the Michelin, Nitto, Conti, etc. is better than the Pirrelli. Still not using the whole 305 though, and you end up paying about $300 more for a set of 4 that you won't ever use fully.
To use a 305, you need an 11-11.5" wheel. An 11 is just slightly too small (295 usable traction patch). 11.5 is just right. And, for those who like to disagree, feel free to mount your 305s up, and send us a photo of a tape measure after you do a nice burn out and try and tell me that the contact patch is bigger than 275-285mm on a stock 10" wheel