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Tire size help?

Discussion in 'Wheels & Tires' started by colton1219, May 10, 2011.

  1. colton1219

    colton1219 [OP] Active Member

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    Arizona
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    4.88 gears, ArB Bumper, ARB lockers front and rear
    I have 285 70 17 KM2 tires and rub to much even with my lift. I have 4.88 gears and a 6 speed to boot so my rpm get a little high.I have considered a 255 85 16 but they are pricey and they will still probably rub?I want to know if I went from a 32.5 tire (my 285 70 17 s') to a 235 85 16 or a 265 70 16 that is only 31.5 tall if it would help or hurt my MPG. I will be going to an A/T tire and also saving about 15 lbs each wheel. My RPms' will go up about 200-400 because of a smaller tire but what do you guys think ,will I help myself with fuel consumption?Thanks
     
  2. KPT

    KPT sees what you did there.

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    What is the backspacing of your rims, and the specs of your lift?

    Did you trim any fender well plastic? Chop the cab mount?
     
  3. colton1219

    colton1219 [OP] Active Member

    Joined:
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    Arizona
    Vehicle:
    SR5
    4.88 gears, ArB Bumper, ARB lockers front and rear
    Backspace is 4.5 and no trimming witch I really dont care about the rubbing, the issue is I want to better my mpg . My question is more about running the different tire sizes and gear ratio I have to get the best MPG?
     
  4. colton1219

    colton1219 [OP] Active Member

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    Vehicle:
    SR5
    4.88 gears, ArB Bumper, ARB lockers front and rear
    46 views and no opinions ,there is another post about 255 tires right now and there are 3 pages . I know somebody can help with my mpg questions ?
     
  5. BigRedToy

    BigRedToy BRT

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    Higher RPMs are going to use more gas, but your driving style is going to make more of a difference. I wouldn't be running 4.88's unless I had 295+'s mounted.

    The question I have for you is, why did you regear?
     
  6. colton1219

    colton1219 [OP] Active Member

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    Arizona
    Vehicle:
    SR5
    4.88 gears, ArB Bumper, ARB lockers front and rear
    Bought the truck that way, and i got a great deal so my question is What tire size do you think I should run to help myself for MPg's with my set up not factory gears? Thanks
     
  7. BigRedToy

    BigRedToy BRT

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    If you drive off road I would run Load range C, AT tires. If you are always on the road choose high quality P rated truck tires. You are going to have better results running bigger tires, I would probably stick with a 285/70 17.
     
  8. mikesdoublecab

    mikesdoublecab LT Chase Truck

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    with 4.88s, 35" or 37" tires...

    i have seen a couple tacos running 4.88 on 33s and they were burning up rubber pretty bad...
     
  9. colton1219

    colton1219 [OP] Active Member

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    4.88 gears, ArB Bumper, ARB lockers front and rear
    what do you mean burning up rubber? Are they wearing any faster than normal ?
     
  10. mikesdoublecab

    mikesdoublecab LT Chase Truck

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    Engage Offroad custom LT kit with King coilovers and bypasses, Deaver J59 leaf packs with custom 8 inch shackles and Bilstein 7100 12" travel shocks, 16x8 Eagle Alloy 137s, 285-75-16 BFG KM2s, custom front bumper and skid, Procomp H911 foglights, custom rear bumper and spare tire carrier, bed bar, Engage Offroad custom chase light rack, Icom V8000 radio
    because of the over-gearing, when they accelerated from a stop, they were peeling out a lot...
     
  11. colton1219

    colton1219 [OP] Active Member

    Joined:
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    Member:
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    Messages:
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    Arizona
    Vehicle:
    SR5
    4.88 gears, ArB Bumper, ARB lockers front and rear
    Thought that would have been a throttle issue?
     
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