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Discussion Starter · #1 ·
Looking to purchase a 09 Challenger RT It has 18in. wheels and tires and I wanna upgrade to 20in. what size tires can I run and Is there any clearance issues?
 

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Welcome to Challengertalk ;) Depending on wheel width as mentioned, if you stick to the common sizes that came on 20" you will be fine 8" 245/45R20, 9"- 10" 275/40R20 These will both work on the front, or square for all 4. The 315/35R20 is also the same height, and would work on a 10.5" in the back only with the right backspacing, and possibly some fender liner trimming and/or rolling the fenders

I think best is 20x9" with 275s square, or 245s front, and 275s rear. The stock 18" wheels are 18x7.5" and came with 235/55R18s. The 245/275/315 will be slightly taller, but shouldn't be an issue
1004845

You can play with tire sizes here


A Guy
 

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Discussion Starter · #4 ·
Welcome to Challengertalk ;) Depending on wheel width as mentioned, if you stick to the common sizes that came on 20" you will be fine 8" 245/45R20, 9"- 10" 275/40R20 These will both work on the front, or square for all 4. The 315/35R20 is also the same height, and would work on a 10.5" in the back only with the right backspacing, and possibly some fender liner trimming and/or rolling the fenders

I think best is 20x9" with 275s square, or 245s front, and 275s rear. The stock 18" wheels are 18x7.5" and came with 235/55R18s. The 245/275/315 will be slightly taller, but shouldn't be an issue
View attachment 1004845
You can play with tire sizes here


A Guy
very nice. thanks for the help.
 

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with an R/T if you used 20 x 9" wheels and want to run 275/40 - 20 on the front, you'll need spacers to get the correct clearance

the OEM wheel size used was 20 x 8" wheels and 245/45 - 20 tires, but the 275 /40 is the same diameter, just need the wider wheel
 
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