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Need help with tire size. I want to be able to rotate the tires. I have a 20x9 wheel. Stock I have 245/45/20 (28.7 inches tall & 8.4 inches wide). I like the height of those tires (not a big fan of the super short sidewalls). From looking at specs on Tire rack it looks like the widest tire I can go with on a 9 inch rim with the same height is the 275/40/20 (28.7 inches tall & 10.2 inches wide). From what I have read on here from other people that should be just fine on the back. But what about the front? Does anyone know if a 275/40/20 will fit ok on the front?
 

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Yes, the 275/40-20 on the front should be ok. See picture below.

Techco Springs w-Bilstiens running Vipers 20x9 275/40/20 & 20x10 295/40/20 Toyo ST
 

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I questioned the SRT engineers about front tire size. They said to avoid any possibility of the tires rubbing on the suspension during hard cornering, they do not recommend going wider than a 245. That being said, you could probably still get away with a 275 if you do not drive your car very aggressively.
 

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I have 275/40/20's and there is only 3/16" between the back/top of the tire and the steering knuckle.
I have not heard or seen any sign of wear but I'm not hard on the corners.
 

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running 275/35-20 on a 10x20 wheel on the front with a high suspension drop. no rubbing.
 

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I'm not a big fan of the uniform setup on these cars.... I've seen 275's on 20x9 up front on Magnums and they clear on the stock suspension height. I don't know if there is a height difference on the Chally vs/ the Chargers and Magnums.

What I can tell you though.... I really, really like having a staggered setup on the car (Charger SRT8) and I find the 245/275 (Front/Rear) tires to be ideal. BTW the overall diameter of the 275/40/20 is the same as the 245/45/20....

Again... if you are set on the ability to rotate.... go for it... but I would feel bad if I did not tell you that a stagger is the way to go.... Especially in the Chally with the shorter wheelbase and better turn in....
 

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Anybody know what a 275x40x9 rear and a 255x45x9 front would do? I'm a fan of rotating myself but these cars just look better staggered.
 

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A 255/45 is going to have a taller sidewall compared to a 275/40. It might look a little weird.
 

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Anybody know what a 275x40x9 rear and a 255x45x9 front would do? I'm a fan of rotating myself but these cars just look better staggered.
I agree. When my tires wear out, I am going with 245s on the front and 275s on the rear. This gives the Challenger a cool retro look, like the 1970 T/A.
 

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A 255/45 is going to have a taller sidewall compared to a 275/40. It might look a little weird.
You mean like this.. :scratchhead:

Yeah, that would look sort of stupid, I didn't think about that..
 

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A 255/45 is going to have a taller sidewall compared to a 275/40. It might look a little weird.
This is correct for the 255/45 vs. the 275/40. But to be honest, it will be pretty tough to see a 1/4 inch difference in the sidewall height. What you are more likely to notice is that the overall tire is taller by almost 3/4 inch. That could look odd but, again, not everyone will notice that if they are not told.

The sidewall height and the overall tire diameter on the 245/45 and the 275/40 are almost identical. (less than a 1/16 of an inch) I went with that stagger for that reason. From a handling perspective, on the Charger, it feels great.
 

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Need help with tire size. I want to be able to rotate the tires. I have a 20x9 wheel. Stock I have 245/45/20 (28.7 inches tall & 8.4 inches wide). I like the height of those tires (not a big fan of the super short sidewalls). From looking at specs on Tire rack it looks like the widest tire I can go with on a 9 inch rim with the same height is the 275/40/20 (28.7 inches tall & 10.2 inches wide). From what I have read on here from other people that should be just fine on the back. But what about the front? Does anyone know if a 275/40/20 will fit ok on the front?
If you have the stock R/T chrome clad wheel its a 20x8 wheel not 20x9. Im going through this myself. looking for a slightly wider rim for the front.
 
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