Tire Conversion Chart.

Discussion in 'Exterior' started by powerhour, Jul 16, 2010.

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  1. R.L.K.

    R.L.K. Supporting Member

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    Wow ! Thanks
     
  2. 16RamBlackOut

    16RamBlackOut Junior Member

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    i am still lost when it comes to this, between the sizing and offset I am just going to not change anything. There has to be a chart somewhere that shows you what will work/fit without changing suspension geometry and requiring recalibration of your speedo.

    I have stock 20" on my big horn by window sticker says they are 20x8 the tire size converts to 10.8" wide (275/65R20) I am not sure what is right. I cant find the stock offset either.

    I just want to put some 24" SRT replicas on it, they are 10" wide and +25.4 offset on them, I am not sure if they will stick out further or what size tire i need to not screw with my speedo. I guess this is why dumb people (me) pay smart people to do this stuff for them.
     
  3. R.L.K.

    R.L.K. Supporting Member

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    The diameter of your wheel has nothing to do with your speedometer , the diameter of your tire will change the speedometer . If you get the same diameter tire you'll be fine there .
    As far as offset , maybe a smart guy will chime in that knows the offset & back spacing of your stock wheels and the replicas you want . I'd say most likely your 20x8 wheels are a + offset or " 0 " even though the replicas are 10" wide you say they are + 25.4mm offset = you'll most likely only be approximately 3/4" to 1" further out @ the wheels , this will also change with the tire width you choose ...
    Come on smart guys where are ya ?
     
  4. 16RamBlackOut

    16RamBlackOut Junior Member

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    found a web site that will break down all the math if you get all of your info for your old and new setup.

    willtheyfit.com and yes its SFW
     
  5. Bigge2511

    Bigge2511 Junior Member

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    Rims and tire issue

    I have a 2016 ram 1500. Stock size is 20x9 with a 275/60/20 tire. I am putting in a 20x9 rim and same size tire but the offset is -12. Will these rub if I don't have. A level kit installed. Everyone keeps saying you have to put them in to see
     
  6. R.L.K.

    R.L.K. Supporting Member

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    That set up will work , the only possible time you would rub would be in Drive or Reverse @ full lock combined with a bottoming out bounce over very rough terrain.
    So if you do not normally BOUNCE through rough terrain @ full lock Right or Left in Drive or Reverse then you will be fine .
     
  7. Bigge2511

    Bigge2511 Junior Member

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    I won't be going over any ruff terrain and we don't get that much snow. Full lock is 4 low I'm assuming
     
  8. R.L.K.

    R.L.K. Supporting Member

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    Sorry , full lock is the steering wheel full right or full left
     
  9. Bigge2511

    Bigge2511 Junior Member

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    Ok yea no rough terrain just normal street
     
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  10. DRkNESS

    DRkNESS Supporting Member

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    Here's where I am to be a pain lol. I currently have 20x9 wheels with oem fitment of 275/60 on them. I'm on Bilstein at 2.1. I want to go with a 295/60 tire to give a slighter fuller look. I don't want off road/ mud tires as I don't do any of that. My current tires are Michelin LTX which SUK in the snow even with 4x4. Does anyone have 295 or even a narrow 35" tire on this set up that they are willing to post photos and thoughts on please ?[​IMG]


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