20x10 front wheel offset?
 

I'm upgrading from the 19" sports and want to add some more tire under the front. It seems that the consensus around here is that a 9.5" wide rim with a 255 tire sits about perfect with a +22 offset in the front. That puts the face of the rim out +31mm from the stock fitment using a wheel offset calculator. So... If I use a 10" wide wheel instead, with a +35 offset, it will put the face of the rim out 25mm from stock and the rear space at 1mm less than stock. Using a 275/30 front tire instead of a 255 adds 20mm to the overall width, but with the 0.5" greater rim width (10" vs 9.5") it adds up to only 4mm wider per side. Therefore, if I'm 25mm out and +4mm on the tire, that equals 29mm total out on the face. That is almost exactly the preferred 31mm stated before. If my math's correct, why do so many people say a 275 tire is tough to fit up front? I definitely can't lower the car due to the roads around here, and I don't want to change camber settings just to fit something that "looks" good. I still want this thing to handle great like it was meant to. That's primarily why I want to run a more square 275 front / 285 rear tire setup. I'm planning a 20X10.5 +15 rear rim to match the front. Are my offset calculations correct before I order the new wheels?

Your math sounds about right. I didn't have any problem with a 275 on the stock wheel or on a 10" +24 wheel.

I have a 20"x10" +31 up front with a 275/35/19 tire, with no rubbing issues. The front sits pretty flush.

http://farm5.static.flickr.com/4111/...42b8524c_b.jpg

Looks great! :tup:

Looks good in my books....

Also remember just because it says 275 does not mean it is 275 wide... Each wheel model and brand has different tread widths and you must prepare your sizing to the tire width you are most likely going to use I.e. 305 Toyo r888's are much wider than 305 Falken fk452's!!! So please find the actual tread width from the manufacturer website of the tires you wish to use. This will help you push the limits without going too far.

Like everyone else has said a 10 +21 or higher will be just fine ;)

Toyo R888 and Falken 452 dont share any common 305 sized tires...

diameter does not matter when it comes to section/tread width... still the point is valid one tires 305 does not equal another tires 305 across brand or across model lines. simply stated one must take this into account when trying to push the limits on offsets and fitment. :hello:

so so so sexy!!! You need center caps now!!!
SSR Wheels - Motorsports