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What tire size?

Discussion in 'Experienced Truckers' Advice' started by Swadian, Sep 3, 2019.

Page 1 of 2
  1. Sep 3, 2019 #1
    Swadian

    Swadian Light Load Member

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    Jan 21, 2017
    Reno, NV, USA
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    Shocked today to hear from the OEM, who says I can choose from 5 different tire sizes to put on my bus without changing the rims. What are the differences between 315/80R22.5, 305/75R22.5, 295/80R22.5, 12.75R22.5, and 12R22.5?

    My tire dealer says 12R22.5 is cheapest, but was as confused as myself that we're able to put any of these 5 on the same rims.
     
    Swadian, Sep 3, 2019
    Swadian, Sep 3, 2019
    #1
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  3. Sep 3, 2019 #2
    Bakerman

    Bakerman Road Train Member

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    295/75R22.5 is the most common tire out there on the road.

    Pretty much all mega carriers run low pro 22.5.
     
    Bakerman, Sep 3, 2019
    Bakerman, Sep 3, 2019
    #2
  4. Sep 3, 2019 #3
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    I would check your manual or somewhere in the bus what it came with from the manufacturer.
     
    Diesel Dave, Sep 3, 2019
    Diesel Dave, Sep 3, 2019
    #3
  5. Sep 3, 2019 #4
    x1Heavy

    x1Heavy Road Train Member

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    You don't mismatch tires on same wheel.

    If you stuck the low pro on your bus you are going to be LOW.

    Whatever your bus requires is what you put on there. Anything else is BS.
     
    x1Heavy, Sep 3, 2019
    x1Heavy, Sep 3, 2019
    #4
  7. Sep 3, 2019 #5
    Swadian

    Swadian Light Load Member

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    Jan 21, 2017
    Reno, NV, USA
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    The Manual from the OEM says I can use any of the 5 tire sizes. However, 295/75R22.5 isn't one of them.
     
    Swadian, Sep 3, 2019
    Swadian, Sep 3, 2019
    #5
  8. Sep 3, 2019 #6
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    Out of those five sizes, I would pick the most popular. Just like a semi truck, a name brand for the steers would be the way to go.
     
    Diesel Dave, Sep 3, 2019
    Diesel Dave, Sep 3, 2019
    #6
    FlaSwampRat Thanks this.
  9. Sep 3, 2019 #7
    starmac

    starmac Road Train Member

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    What gear ratio are you running, would be the difference between whether you wan 12R or low pro.
     
    starmac, Sep 3, 2019
    starmac, Sep 3, 2019
    #7
    Swadian Thanks this.
  10. Sep 4, 2019 #8
    Swadian

    Swadian Light Load Member

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    Jan 21, 2017
    Reno, NV, USA
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    3.21 axle ratio with a direct drive transmission. The current tires are 315/80R22.5 but those are hard to find. It seems this bus likes to have a wide footprint.
     
    Swadian, Sep 4, 2019
    Swadian, Sep 4, 2019
    #8
  11. Sep 4, 2019 #9
    starmac

    starmac Road Train Member

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    I do not know the height of those 315/80's, but I am betting they are close to the 12 R22.5, you should check, but I bet that would give you the same ratio to the ground as you have , or at least very close.
    Now 12R22.5's are not going to be easily found just anywhere either, but are the same height as 11 R 24.5 which are common, if it would be feasible to change wheels.
     
    starmac, Sep 4, 2019
    starmac, Sep 4, 2019
    #9
  12. Sep 4, 2019 #10
    Ridgeline

    Ridgeline Road Train Member

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    What do you have on it now?
     
    Ridgeline, Sep 4, 2019
    Ridgeline, Sep 4, 2019
    #10
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