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255/75/r17

Discussion in 'Wheels & Tires' started by Dsmooth87, May 24, 2012.

  1. May 24, 2012 at 5:51 PM
    #1
    Dsmooth87

    Dsmooth87 [OP] Well-Known Member

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    i currently have the stock 265 70 r16 tires and rims and wanted to convert to 255/75/r17. what size aftermarket wheel will i need to run these tires? and since i have the 6 speed will the taller tires help with freeway mpg?
     
  2. May 28, 2012 at 3:26 PM
    #2
    Dsmooth87

    Dsmooth87 [OP] Well-Known Member

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    lets not all respond at once
     
  3. May 28, 2012 at 3:40 PM
    #3
    Large

    Large Red

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    Maybe if this was in the wheels & tires section you would get a prompt response. You would want a 17x7.5 or 17x8 (check with tire manufacturer specs so you know the least and most width you need on a wheel) and ideal backspace is 4.5 inches.
     
  4. Jun 13, 2012 at 1:40 PM
    #4
    greenrustic

    greenrustic Well-Known Member

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    I am thinking about going with this size too. What did you end up doing?
     
  5. Jun 13, 2012 at 1:55 PM
    #5
    jds0912

    jds0912 Well-Known Member

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    Some shit I got on craigslist
    I have this tire. It wont improve MPG and increases RPMs at cruising speed. Granted I went from an AT to an MT. I have 7.5 backspacing I believe on my tundra wheels, and have had zero issues, Im sure stock tacoma 17s will work. Its a great tire size for a small or no lift truck. Look on craigslist for used tires in this size and I can assure you you will find someone with a jeep wrangler who stepped up to 33/35's and is selling their dunlops or BFG KM1's cheap. Thats what I did and I got a smoking deal. Additionally, if you shred a tire it should be pretty easy to replace because there are a billion wranglers who use this tire.

    I have had no problems rubbing even stuffed.
     
  6. Jun 13, 2012 at 2:02 PM
    #6
    OZ-T

    OZ-T Quite an experience to live in fear , isn't it ?

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    How would it increase RPM's at cruising speed if it's a larger diameter than the OEM tires ?
     
  7. Jun 13, 2012 at 2:06 PM
    #7
    greenrustic

    greenrustic Well-Known Member

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    ?
     
  8. Jun 13, 2012 at 2:07 PM
    #8
    OZ-T

    OZ-T Quite an experience to live in fear , isn't it ?

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    wut
     
  9. Jun 13, 2012 at 2:09 PM
    #9
    greenrustic

    greenrustic Well-Known Member

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    I have the same question as you. Guess x2 would have been more appropriate.
     
  10. Jun 13, 2012 at 2:18 PM
    #10
    tacomalex

    tacomalex Well-Known Member

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    I ran this size on a set of TRD Sport wheels. I ran em with and without spacers, on a 3" lift with no rubbing.

    As for MPG they came after a lift and I went with LT instead of P rated (wish I would've gone P) and it definitely hurt my MPG.

    As for OZ.. yeah my highway RPM's went down. No idea what that guy is smoking.
     
  11. Jun 13, 2012 at 3:48 PM
    #11
    Canuckwithatruck

    Canuckwithatruck Well-Known Member

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    I am planning on putting a set of 255/75/17 silent armors over the weekend. Hoping not to see a big decrease in mileage vs 265/65/17.
     
  12. Jun 13, 2012 at 4:24 PM
    #12
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    greenrustic, it can't increase your RPM's at cruising speed unless you mess with gearing.
     
  13. Jun 13, 2012 at 4:31 PM
    #13
    krimson

    krimson Nothin

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    Taller tires will not help highway speed MPGs. Taller tires = higher RPMs.
     
  14. Jun 13, 2012 at 4:33 PM
    #14
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    Umm... no, taller tires = lower RPMs at the same speed. And when I went from 265/65R17 to 265/70R17, my highway MPG did get better.
     
  15. Jun 13, 2012 at 4:34 PM
    #15
    krimson

    krimson Nothin

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    Really? Because when I came from a 265 to A 285 my MPGs went down the drain :notsure: I'm usually at 2k at 70 MPH.
     
  16. Jun 13, 2012 at 4:37 PM
    #16
    Pugga

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    Because you went to a wider tire... Keep tread pattern and width the same, increase the height just a little, like from a 65 to a 70 series, and your highway MPG's will get a little better (obviously pending the driver). Going to a 285 will hurt MPGs, wider tires will do that.
     
  17. Jun 13, 2012 at 4:42 PM
    #17
    krimson

    krimson Nothin

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    I've always thought it has to do with the height of the tire and the weight of the tire. Higher A tire = higher RPMs
     
  18. Jun 13, 2012 at 4:45 PM
    #18
    Tacomada

    Tacomada Well-Known Member

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    Unless you've done some recalibrating when you think you're doing 70 you're actually doing 75ish. difference in circumference is 7 and a bit percent.

    someone correct me if im derping here... but the spedo - tach ratio will stay the same regardless of tire size for a specific gear.
     
  19. Jun 13, 2012 at 4:47 PM
    #19
    OZ-T

    OZ-T Quite an experience to live in fear , isn't it ?

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    A taller ( larger diameter ) tire travels more distance per axle revolution than a shorter ( smaller diameter ) tire , therefore you either ;

    1) go faster on the taller tire at the same RPM

    or

    2) go the same speed at a reduced RPM
     
  20. Jun 13, 2012 at 4:49 PM
    #20
    Tacomada

    Tacomada Well-Known Member

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    There are tonnes of factors. Tread design impacts rolling resistance, increased weight makes the tire harder to turn, wider tire makes the tire have more wind resistance (and usually weight).

    Not sure how a larger diameter tire could increase rpm at a given speed? It may required a lower gear to have adequate power to turn the tires, which would increase rpm..
     
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