Tire Speed and Load Designations

Discussion in 'Tech/Mech General' started by madbluemad, Jun 23, 2008.

  1. madbluemad

    madbluemad

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    Hi

    The tires on my mh do not have a speed designation letter/number however the owners manual says that a Light Truck should be driven at 81 mph Max.

    Marked on the tire is: MAX LOAD 2680 LBS at 80 psi.

    The tire is marked LT/225/75/R/E and so I think that I need a 225/75/R (I dont know what the E means) with a load rating of 2680 LBS inflated at 80 psi.

    I dont know what the designation for the load is but what do you think, am I correct.

    These are American Tires.

    Jim
     
  2. olley

    olley Funster

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    Hi I believe the "E" means its an 8 ply. this from google:


    A = 2 Ply Rating
    B = 4 Ply Rating = 35 psi max. load inflation
    C = 6 Ply Rating = 50 psi max. load inflation
    D = 8 Ply Rating = 65 psi max. load inflation
    E = 10 Ply Rating = 80 psi max. load inflation
    F = 12 Ply Rating = 95 psi max. load inflation
    G = 14 Ply Rating
    H = 16 Ply Rating
    J = 18 Ply Rating
    L = 20 Ply Rating
    M = 22 Ply Rating
    N = 24 Ply Rating
    XL= Extra Load
    REIN= Reinforced

    When referring to speed ratings "M" is the speed rating for 81mph, I know cause I have just had to buy one.:Sad:

    Olley
     
  3. Geo

    Geo Trader - Funster

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    I belive it means a 10 ply
    this from Olley

    A = 2 Ply Rating
    B = 4 Ply Rating = 35 psi max. load inflation
    C = 6 Ply Rating = 50 psi max. load inflation
    D = 8 Ply Rating = 65 psi max. load inflation
    E = 10 Ply Rating = 80 psi max. load inflation
    F = 12 Ply Rating = 95 psi max. load inflation
    G = 14 Ply Rating
    H = 16 Ply Rating
    J = 18 Ply Rating
    L = 20 Ply Rating
    M = 22 Ply Rating
    N = 24 Ply Rating
    XL= Extra Load
    REIN= Reinforced
    Geo:Rofl1::Rofl1::Rofl1:
     
  4. olley

    olley Funster

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    just call me Mr Magoo :Rofl1::Rofl1:

    Olley
     
  5. moandick

    moandick Read Only Funster

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    Definitely should have gone to Specsavers :Eeek::Eeek:
     
    Last edited: Jun 23, 2008
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