Wheels and Tires 22.5" Vs. 24.5"

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Blackducati750, Mar 2, 2011.

  1. rank

    rank Road Train Member

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    Feb 11, 2010
    50 miles north of Rochester, NY
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    7 pages of replies over 3 1/2 years and nobody mentioned that often you can't use sliding winches and a low fifth wheel with 24.5's.
     
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  3. t600kw

    t600kw Bobtail Member

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    Nov 6, 2013
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    Well, in physics class a teacher rolled two wheels down a slope, same diameter, same weight, one had all the weight on the edge the other wheel had it spread out across the diameter, ,The one with spread out weight accelerated twice as fast and beat the other handily. It's something to consider on tires.
     
  4. bigguns

    bigguns Road Train Member

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    Jun 13, 2013
    Omega,GA
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    If I understand this correctly, with out of balance wheels I can go faster. Right?
     
  5. Hernjor

    Hernjor Bobtail Member

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    Mar 29, 2018
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    Can I legally run 11r22.5 as sterring tires and 11r24.5 in my back axles ??
     
  6. Hernjor

    Hernjor Bobtail Member

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    Mar 29, 2018
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    Can I legally run 11r22.5 for steering and 11r24.5 in my back axles ?
     
  7. special-k

    special-k Road Train Member

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    Southern Ontario Canada
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    Of course you can.
     
  8. Hernjor

    Hernjor Bobtail Member

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    Mar 29, 2018
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    I’m trying to get all the trucks on 24.5 and the tanks on 22.5
     
  9. Silver Creek

    Silver Creek Bobtail Member

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    Nov 3, 2015
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    Ok Boys and Girls.
    I read the whole tread..

    let's do some math!!!!

    Let's talk tire rotations per mile

    per mile.....

    ok 22.5 LP is about 510-513 rpm

    and conveniently at 60 mph is rpm per minute so let's thibk about that at 60 mph the tire rotation is per mile and per minute exactly ..... Ok

    24.5 rotate at 470 rpm

    now 508-470=38
    38 rpm per minute/mile

    38 x 5000 miles equals 190000 revolutions saved. that's 404 miles of rotation saved by tall rubber. that's about 2 weeks of driving. less wear on the bearing and rear ends.

    now if an engine's power pulses per mile is a concept to you. at 60 mph and 1500
    rpm on the motor take 1500÷60÷2 and get the pulses per second for a 4 stroke diesel. so if you lower the tire rpm you lower the theoretical max fuel available to a motor as pulses per mile decrease with taller gears tires.

    so you looking at saving hard parts and tire wear and the 1000 miles saved is no where near correct. 5000 miles saved you average 400 miles worth of rotation.

    go to 100,000 miles it easily 8,000 miles of driveline rotation saved.

    so to each there own.

    bit when I climb hills is isn't as easy with talks but I also can't use as much fuel by design.

    yes 22.5 are better in a weight vs profit for the combination weight of the truck but tire chains weigh more than the difference of tires.

    hope this made NO sense.
     
  10. ABiceRoads

    ABiceRoads Bobtail Member

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    Apr 30, 2018
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    so by changing tire size do they change your axel ratio for rear ends?
    I am sure your speed odometer and rpm meter will be out and you have to calibrate them.
    I asked this question to many guys, all have different views without any explanations, also saw some calculators on the internet to calculate your new ratios when you change tire size.
    looking for the expert advice who changed their tire sizes from 24.5 to 22.5.
     
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