It looks like the Pikes Peak wheel is a 20x9 wheel. It would be a good idea to use an online tire fitting/calculator to see what the max width tire is recommended for the wheel. Also see what the OD difference is.
I know when I bought my '11 the 19" Everest wheel had 285/45's on them. I went back to OE size when I replaced the tires.

 

Anything will "fit".... There are optimal width charts if you want to follow them, but just like in the modding scene, you can stretch skinny tires on wide wheels or you can stuff wide tires on skinny wheels to have the rim protected by the sidewalk, etc. it all comes down to the look and type of performance you're after from said setup.

 

Size-em-up!

 

definitely fits.

 

@amirhz - technically they will fit. Legally though is another story.

The minimum width for a 285/45 tyre is a 9.5" rim. That being said, you're only out by a few mm but, depending on your Insurer, if you were to have them fitted and be in an accident, they could deny the claim as the car would technically (there's that word again) be unroadworthy. You will find some tyre manufacturers even now list the minimum rim width on the sidewall which would further damn you if said accident resulted in overly-aggressive assessor.

For low profile tyres (up to 45 profile), here's a rough calculation method to see if tyres will be legal (in Australia at least) on a given rim. * I am not an expert and this is general information based on personal observations only ...yadda yadda yadda

Convert all measurements to be the same base (eg mm or in). Let's do it in mm.

Take the width of the rim (9x25.4) and add 1 more inch (25.4mm) = a total of 254mm.

Now, take the width of the tyre (285mm) and subtract 1 inch (25.4mm) = a total of 259.6mm

If the calculated number of the tyre is more than the calculated number of the rim then it's probably not legal.

Now, if you had 9.5in wide rims you'd be ok.


As another example, could you fit 305 tyres to a 10" rim?

10in rim (254mm) plus 1 inch (25.4mm) = 279.4mm
305 tyre less 1 inch (25.4mm) = 279.6mm

As the difference is less than 0.5mm, it is rounded to zero, therefore legal.

That's why for example you need 10.5" rims to fit 315s (292.1mm rim calc / 289.6mm tyre calc = good to go)

Hope that helps.

Oz

 

@amirhz - technically they will fit. Legally though is another story.
If you were to have them fitted and be in an accident, they could deny the claim as the car would technically (there's that word again) be unroadworthy.

Are they that in depth after an accident over there? I haven't heard of that by me. I would think the ones that would be that pedantic would be an assessor who's main job is to find a reason to deny a claim.

 

Recently, there was a case here of a claim being denied over the theft of a Porsche Macan from inside a locked garage at the owner's residence.

The reason given for the denial by the Insurer was that the owner had left the keys on a hook in the garage which, according to the Insurance company, was not adequate protection or security due to leaving the keys in the immediate proximity to the vehicle...despite the fact that the thieves had to break in to get to the garage.

They fine print is always coming after you and in the hands of a pedantic assessor.....

Oz

 

In that case you could almost agree with the insurance company despite the thieves having to break in first.