Going from 22.5 to 24.5 tires.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by quiphauler, May 31, 2013.

  1. quiphauler

    quiphauler Bobtail Member

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    Feb 24, 2013
    Lawler IA
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    Looking to lower my rpms. I have a 10 speed with 3.58's and run 1450 rpms at 65 mph. How much rpm drop would I get going to 24.5's.
     
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  3. hmtruk

    hmtruk Light Load Member

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    Jun 7, 2009
    big lake ,mn
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    go to eatons road ranger web site. look for road speed cal. there you can enter all of your info and it will tell you.
     
  4. See Are125

    See Are125 Light Load Member

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    May 23, 2013
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    It really depends on tire size. What size do you have now? If I'm not mistaken, a low pro 24.5 is the same diameter as an 11R22.5. Maybe you could just get larger tires if you don't have big rubber already and save some $$ on buying new wheels. Plus 11R22.5s will ride better than a low profile 24.5.
     
  5. little cat 500

    little cat 500 Road Train Member

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    Jan 17, 2010
    Abbottstown PA
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    should drop you around 100 rpm i went from low 22's to tall 22's same as a low 24 about 100
     
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  6. heavyhaulerss

    heavyhaulerss Road Train Member

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    Dec 23, 2009
    AL/TN BORDER
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    just make sure your new tire size does not put your cruising speed at a lug speed.
     
  7. SHO-TYME

    SHO-TYME Road Train Member

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    Apr 20, 2011
    Dahlonega, GA
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    Lowering the rpm too much will result in more fuel burned rather than saving fuel.
     
  8. Flightline

    Flightline Road Train Member

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    Oct 1, 2011
    Almost There
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    I am switching my steers out this week from 24.5 low pro to a 22.5 low pro.
    Gona sell wheels and tires or trade you even up.
     
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