Anybody want to trade for my 20" OEM Wheels/Tires?

Discussion in 'Dodge Challenger General Discussions' started by tklietz, Jun 3, 2021.

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  1. Jun 3, 2021 at 6:47 PM #1
    tklietz

    tklietz Member

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    Hi all - Hope this is ok to ask this question. I know this may sound kinda crazy but I live on a County Road that isn't maintained which is a really rough ride until I get to pavement. So, I want to swap out my 2020 20" OEM RT+ Blackout Wheels for black 18" OEM wheels which will give me some more rubber and hopefully a bit smoother ride. Mine have about 700 miles on them. Yep, I'm old...
     
  2. Jun 3, 2021 at 9:20 PM #2
    70-426_10-SRT

    70-426_10-SRT B&E body lover

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    Just make sure 18" will fit on your year & model.
    They may have done something with the brakes like on the SRT?
     
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  3. Jun 3, 2021 at 10:04 PM #3
    68MOPAR

    68MOPAR Full Access Member

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    Not crazy at all. 20" wheels belong on sports cars, not MOPAR muscle. I'm looking to do the same.
     
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  4. Jun 4, 2021 at 9:12 AM #4
    SRT-Tom

    SRT-Tom Well-Known Member Staff Member Super Moderator Article Writer

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    One word of caution. The 20-inch wheels were specified to fill out the wheel wells. An 18-inch wheel will not do that and will leave a gap between the top of the tire and the fender. If you want to avoid this look, you will have to drop the suspension.
     
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  5. Jun 4, 2021 at 10:02 AM #5
    Farmer Fran

    Farmer Fran Full Access Member

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    If you keep the same ratio yes. If you keep the same tire diameter it will not. What are the 18" tire specs?

    EDIT: also if the 18" are smaller diameter the speedo will be off.
     
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  6. Jun 4, 2021 at 10:17 AM #6
    SRT-Tom

    SRT-Tom Well-Known Member Staff Member Super Moderator Article Writer

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    You are correct. A 245/45-20 tire has a diameter of 28.7 inches. A 245/55-18 tire has almost the same diameter at 28.6 inches.

    Another thing to consider is handling. A 45 aspect ratio tire will normally outperform a 55 aspect tire.
     
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  7. Jun 4, 2021 at 1:40 PM #7
    B5blueRT

    B5blueRT Full Access Member

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    So what the guys are saying is to make sure you keep the same tire diameter to keep the electronics in order. Go with the 245/55-18's. You wrote that your current wheels are from a 2020 RT Plus. I went from the OEM RT Plus 20" wheels on my 2015 to a EOM 18" for winter tires. Brake clearance shouldn't be an issue if you have the RT Plus. It could be a concern with the SRT's.
     
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  8. Jun 7, 2021 at 2:47 PM #8
    Darrell Feit

    Darrell Feit Member

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  9. Jun 7, 2021 at 2:48 PM #9
    Darrell Feit

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    Doesn't a 20" have more surface traction than an 18" with same specs?
     
  10. Jun 7, 2021 at 3:37 PM #10
    70-426_10-SRT

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