Fuel mileage hit with new drive tires

Discussion in 'Ask An Owner Operator' started by Edjahman, Apr 15, 2018.

  1. Edjahman

    Edjahman Light Load Member

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    Hello.

    I tried the search function and didn't come up with much so here goes.

    I recently purchased new drives, 8, and I noticed a pretty significant drop in fuel mileage.

    I've read that this is normal because of the rolling resistance caused by the thick new lugs that wiggle.

    I'm pretty sure that I have lost upwards of 1 mpg and this seems really excessive...it's been really windy lately so it's hard to get a handle on exactly how much though. It seems anywhere from, .5 to 1 mpg depending on conditions.

    What is a normal amount of fuel mileage loss or can some of you tell me how much you have personally lost due to new drives.

    Thank you.
     
  2. MysticHZ

    MysticHZ Road Train Member

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  3. Old Man

    Old Man Road Train Member

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    Did you check rolling resistants on new tires?
     
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  4. Edjahman

    Edjahman Light Load Member

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    Yeah it's 102. They are Yokohama 517's. I absolutely did consider that before my purchase.

    They were trying to sell me kellys which are 145 RR, I believe.

    I haven't looked up the RR for my old tires but I'll check it out.
     
  5. Edjahman

    Edjahman Light Load Member

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    I was just trying to get a ballpark estimate on loss of MPG based on other people's experiences.
     
  6. freebeertomorrow

    freebeertomorrow Medium Load Member

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    did you consider the mileage difference in new tires vs old? i noticed the same 500 mile run will show a 10 mile difference after new tires. not a huge difference, but worth considering.
     
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  7. special-k

    special-k Road Train Member

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  8. dibstr

    dibstr Heavy Load Member

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    Absolutely a consideration. I’ve had speedometers/odometers over report speed/distance by over 3 mph with older worn tires vs new tires. On a 500 mile run that’s approximately 25 miles being over reported. After putting new tires on, the larger diameter (Actually the circumference) makes it appear that your fuel mileage has dropped because you have now actually traveled 500 miles on the new tires but on the old tires you only thought you had but it was actually approximately 475. Confused yet?
     
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  9. Edjahman

    Edjahman Light Load Member

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    Very interesting stuff. Thank you for the replies!
     
  10. Banker

    Banker Road Train Member

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    I replaced 18 in roughly a 6 month period. I went to a slightly lower RR on my drives, but in combination with winter blend fuel and new rubber I lost 1 mpg. It sucked, but I expected it. .5 should come back when winter fuel is gone and warm weather is back to stay.
     
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