Official YARIS Wheel & Tire Guide

[Black Yaris]

that is a hard one Z since almost every tire is dirrerent.... let say my 225/50VR15 BFG g-force sports and if BFG made a Traction T/A in the same size, with the same speed rating.... the actual contact patch is different, and depending upon how they cam out of the mold the beads could be closer or farther apart, making them easier or harder to mount.

As for personal preferance I like my tire to slightly overhang my wheel for 2 reasons (1) to protect my wheel on curbs (2) I like the little bit of extra width and the tiny bit of extra sidewall flex ya get
so to answer your question, if I had to put a # on it I would say wheel 95% of the tire contact patch width (NOT size i.e. 225/50R15)

[Doc Zaius]

Originally Posted by Black Yaris

so to answer your question, if I had to put a # on it I would say wheel 95% of the tire contact patch width (NOT size i.e. 225/50R15)

Ok... your wheels are 15x7's, right? And a 225mm tire is about 8.9" wide... so the difference there is about 79%. So does that mean if you're aiming for a 95% ratio with the contact patch, then the contact patch is somewhere around 7.4" wide? If thats true, I'm surprised theres a 1.5" difference between tire width and contact patch... pretty big. I wonder how that would change with different types of tires, like you said. Or would the contact patch actually be wider...?

All very interesting. If there was a 7.5" or 8" wide wheel, would you have gone with that instead, yielding a 85% or 90% ratio between wheel & tire widths respectively? Do you think that might result in less sidewall flex?