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increased ground clearance

Discussion in 'Wheels & Tires' started by chihawks35, Mar 26, 2013.

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  1. chihawks35

    chihawks35 Member 1 Year

    If im upgrading from a 31" tire on a 17" wheel to a 33.5" tire on an 18" wheel about how much more ground clearance do you think i will get. i mean basic math would say about 2 inches but how true is that?
  2. SurrealOne

    SurrealOne Former Member ROTM Winner 1000 Posts

    Since you only provided overall diameter of the wheel and the tire (i.e. didn't provide tire width and profile information), I can't calculate what you're asking about, as there's not enough information. So, instead, I'll link you to the calculator I'd use and you can calc it, yourself, and answer your own question.

    http://www.miata.net/garage/tirecalc.html

    Best I can do given the info provided. :)
  3. chihawks35

    chihawks35 Member 1 Year

    this doesnt seem to give me any ground clearance information it just shows my spedo difference im going from 265/70/17 to 275/70/18
  4. SurrealOne

    SurrealOne Former Member ROTM Winner 1000 Posts

    Try paying attention to the 'diameter' information for the old and new tire sizes. The delta between the two is the clearance you'll get. ..after considering/accounting for both wheel and tire information, which is what you were looking to do.
  5. chihawks35

    chihawks35 Member 1 Year

    i see what you're saying thanks
  6. barefoot greg

    barefoot greg Rockstar 100 Posts

    goin from a 31 to a 33.5 should give you about an 1.25 inch gain in clearance. the center of both tires will mount to the hub in the same spot. so of the 2.5 inches of difference in size, half will be on top, and half will be on the bottom( which is what is going to add clearance)
  7. TimTom64b

    TimTom64b Member 2 Years 500 Posts ROTM Winner Gold Member

    The real benefit of the larger tires are that it will fill the wheel wheels better and just give more balance to the look of your vehicle. 33.5's are what I am running on mine...:)))
  8. chihawks35

    chihawks35 Member 1 Year

    yea your truck is nice i think it will look good. thanks for the help

    ps, i like that custom encore you have looks good, i have an omega

    - - - Updated - - -

    yeah i think the ones im looking at (nittos) are like 33.64 inches so that should look nice
  9. RayVoy

    RayVoy Well-Known Member 2 Years 1000 Posts

    Yep :great: it's actually the radius of the tires you need to use. The 31 has a radius of 15.5", the 33.5 has a radius of 16.75". The difference, as calculated by @barefoot greg, is 1.25"
    This would be the effective increase in clearance.
  10. chihawks35

    chihawks35 Member 1 Year

    yea it should pick me up a little bit thanks

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