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Ok, I've just received my 17 Scat/Shaker yesterday and i have wanted to purchase HK Repo's last month. I've searched and searched on the forums. I want to keep the stock front tires and rim width. I want a big tire in the rear but just want to bolt up. I've read, 295's rub and then they dont, 305's rub but most rebut that , 315"s need a quick persuasion with a 2lb hammer. So I want to purchase bronze HC repo's tonight. 20 x 9.5 in front with stock 245's, Rear 20 x 10 with what I am thinking 305's. Will the 305's work no problem? Now I wanted the 315's but if you use the tire comparison nobody is going to see a 1/2" or so, so I'd rather just bolt and go. Any help would be really appreciated and if any sponsors can answer me I will purchase the set tonight on the spot!
 

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If you are going to go with 9.5's then think about 275's in the front. I believe 305's should be good with an offset. Not sure about the 315's.
 

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I think the max rim width for 245s is 9". So look at 275/40 for the front.
what is the offset of the rims? I just put 20x9 ET 20, and 20x10 ET30 on my 2016 scat pack, with 275-40-20 front and 295-40-20 rear
The rears needed a bit of the fender liner plastic cut out and some gentle persuading with a 3lb hammer.
 

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Don't do 245s in front. They look stretched with a 9 inch rim. Also if you do a 305/35..your back will be shorter than your fronts (245/45..255/45 or 275/40) and that will look disgusting.
If you are doing a 305 Nitto, be warned...they look like 275s from any other make.

I would do a 275/40 front and 295/40 rear

Why don't you just get the 9.5 and 10.5 rear rims.? .I believe Factory Reproductions makes them . Then you can live the dream with the 315s. They wont rub with 20mm or lower offset
 

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Don't do 245s in front. They look stretched with a 9 inch rim. Also if you do a 305/35..your back will be shorter than your fronts (245/45..255/45 or 275/40) and that will look disgusting. It's only about an 1/8" difference in radius(.28"dia). Barely noticeable, if at all.
If you are doing a 305 Nitto, be warned...they look like 275s from any other make. Why is that? The sectional width is comparable to other 305's

I would do a 275/40 front and 295/40 rear

Why don't you just get the 9.5 and 10.5 rear rims.? .I believe Factory Reproductions makes them . Then you can live the dream with the 315s. They wont rub with 20mm or lower offset
315's with 20mm offset would probably stick out beyond fender a bit.
 

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FWIW...
275/40-20's...28.6" Dia....at least 9.5" rim...which is stock for SRT's...
305/35-20's...28.4" Dia....and need at least a 10" rim...
315/35-20's...28.7" Dia..and need at least a 10.5" rim.
I run the 305's on my DR's and no problem with fit...
 
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