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Discussion in 'New Member Check-In' started by Chuck P, Dec 6, 2021.

  1. Chuck P

    Chuck P New Member

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    New owner of a 2015 Challenger R/T Plus. Wondering if anyone knows the minimum size (hopefully 215 or 225) and the maximum size (hoping 255) tires that fit on the 20"×8" rims. Have 245/45zr/20 on all four wheels now. Thanks, Chuck
     
  2. 70-426_10-SRT

    70-426_10-SRT B&E body lover

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  3. 70-426_10-SRT

    70-426_10-SRT B&E body lover

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    After re-reading your post it sounds like you want to STAGGER front and rear tire heights. :boxed:

    I would NOT Recommend that drastic of a height difference.
    My 2010 SRT came from the factory with 245/45/20 and 255/45/20
    And I replaced them with 275/40/20's all the way around.
    Wanted to go old school Skinny-FAT, but the forged SRT rims are 9"

    215-255.jpg
     
  4. SRT-Tom

    SRT-Tom Well-Known Member Super Moderator Article Writer

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    Welcome to challengerforum.com

    A 245/45-20 is the widest tire that will fit on an 8-inch wheel. A 225/40-20 is the narrowest tire that will fit on an 8-inch wheel. The problem, however, is that a 245/45-20 aspect ratio tire has a 28.7-inch diameter and a 225/40-20 has a smaller 27.1-inch diameter. This will throw your speedometer off.

    Either buy wider wheels (e.g., 9 or 10-inch) with the proper offset, or keep the 245/45-20s that you have.

    https://www.tyresizecalculator.com/charts/tire-width-for-a-wheel-rim-size-chart
     
    oldgeezer likes this.
  5. Wizard of Iz

    Wizard of Iz Full Access Member

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    Welcome to the neighborhood.

    I hope you're enjoying your new-to-you Challenger.
     
  6. B5blueRT

    B5blueRT Full Access Member

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    Welcome, glad you decided to join the forum. In case you're not sure, your 2015 RT PLUS came from the factory with 20' x 8.0" wheels. (I confirmed with my build sheet.)
     
  7. Chuck P

    Chuck P New Member

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    Thanks for all the replies.. wanted wider rear tires, narrower fronts, sorta old school... love the 8" rims so I will keep researching to find narrower, taller fronts etc.
     
  8. SRT-Tom

    SRT-Tom Well-Known Member Super Moderator Article Writer

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    Don't go below a 225 with your 8-inch rims. That size tire will not wear or perform properly. Look at the following diagram (image on the right).

    Tire Fitment.jpg
     
  9. Chuck P

    Chuck P New Member

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    Thanks
     
  10. gostro

    gostro Full Access Member

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    Welcome! Thankfully, everybody else already answered your tire questions because I'm not all that great at it yet!