275/40- 20 Tires

Discussion in 'Challenger Wheels, Tires and Brakes Forum' started by SRT-Tom, Jan 26, 2018.

  1. SRT-Tom

    SRT-Tom Full Access Member

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    If anyone wants to know, you can install 275/40-20 tires on stock 9" wide wheels on the front and rear of a 2008-2010 Challenger SRT without clearance issues.

    The 9" wheel (rim width) is right in the sweet spot for 275/40 tires. Essentially, the 275/40 is a "plus zero" size up from the stock 245/45 tire. The diameter and sidewall heights remain the same. You are just shifting the tread width size and compensating with a lower aspect ratio.

    Here is a photo of the rear tire clearance.

    [​IMG]
     
    Last edited: Jan 27, 2018
    BobFake and IntimidatorRT like this.
  2. BobFake

    BobFake New Member

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    I did this on my 2014 SRT Challenger which came with 245/45 in the front and 255/45 in the rear. I went up to 275/40 in the rear and 255/45 in the front with no issues and no affect on the speedometer.
     

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