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I have an 08 SRT. Stock Suspension. Right now the car has aftermarket SRT chrome replicas, which I believe are 20x9, I bought it used 3 years ago. Still has the Eagle RS-A tires. Only 18k miles. Anyways, I have my eye on some Mickey Thompson Street Comp SC-5's. Not sure what size to go. Here's what they have:

20x9 +10 offset
20x10.5 +24 offset

Also looking at the Mickey Thompson Street Comp tires.

I'm curious about doing 275/40r20 all around. Would I do that with the 10.5" wheels? Is that too wide for the front? Would those fit on the 9" +10 offset all around?

Or would 245 on 9" +10offset fit all around?

Or Staggered 245 on 9" up front and 275 on the 10.5 " in the rear? Or get crazy and go 245 on 9 front and 305 on 10.5 rear?

This is my daily driver. I don't take it to the track. Basically I would just like to know what combination of these wheel and tire sizes would work for my car or if anyone has done these exact set ups. I searched the threads and found stuff similar but non with these offsets. Any help would be appreciated. Thanks.
 

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On my 2009 SRT, with the factory 9" forged aluminum wheels, I went with a staggered "old school" set up- 245/45-20 Cooper Zeon RS3-G1 tires on the front and 275/40-20 tires on the rear. They are the same diameter and look killer on my car.

Here are three photos of the 275/40-20 on the rear of my car.
 

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No way would I do a 275 on a 10.5 rim. They will look stretched...even more so if you do the same tire on a 9". That front 9" wheel will show bulge. The back 10.5 will look stretched. It will look odd.
I would do: 245/45 Front & 295/40 Rear.
I don't like 305/35s because they are shorter than the fronts. Folks here don't think its a big deal but I can spot that a mile away and looks like ass to me. Rears should be the same height or taller.
315/35 (same height as 245/45 or 275/40) is the real deal but I don't know if you want that wide of a tire.
 
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