Load Range C or D ??

Discussion in 'Tires / Brakes / Bearings / Axles' started by TX_F2, Aug 7, 2008.

  1. TX_F2

    TX_F2 New Member

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    I'm new to the pup community (got our 1st pup 4 wks ago) so I was not sure about this.

    1996 Coleman Sun Valley

    GVWR = 2500 lbs
    GAWR = 2200 lbs


    Duro Load Range C tires:

    Load = 1360 lbs ea (2720 lbs total)


    Duro Load Range D tires:

    Load = 1660 lbs ea (3320 lbs total)


    I ordered a pair of Duro Load Range C tires yesterday, they give me a "cushion" of 270 lbs over the GVWR. Is that enough of a safety cushion or should I have ordered the Load Range D tire ?

    I don't normally load the pup to it's GVWR and the LR D tires have a larger than stock sidewall and OD but I wanted to get a stock sized replacement.

    So I want to hear some input from you guys on this.


    TIA

    1996 Coleman Sun Valley
    2008 Dodge Ram 1500 QC V6
     
  2. theseus

    theseus CamperMod Addict - Thinking about the Dark Side... Silver Supporting Member

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    I personally would have gone with load range D tires if they fit. The D range tires should be longer lasting and in my opinion a 270 lbs cushion is not enough...

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  3. ogeer3

    ogeer3 New Member

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    I agree with theseus I would have gone with the load range D tires as well.
    1. 270 lbs is not enough cushion for me.
    2. When at proper air pressure they should run cooler.

    Otis
    '05 Silverado TV - '03 Skamper PU
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  4. awsandlin

    awsandlin Active Member

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    Load range D cost only a few dollars more than the Cs and to me would be well worth the extra dollars.

    Allen
    2004 Fleetwood Utah
     
  5. TX_F2

    TX_F2 New Member

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    Thanks for all the input so far....... although now I'm more confused. lol

    This is from Fleetwood on the 2008 Sun Valley:

    GVWR = 3500 lbs

    (My 1996 Sun Valley has a GVWR of 2500 lbs)


    The factory equiped tire for the 2008 Sun Valley is:

    ST185/80D13

    Please correct me if I'm wrong (I probably am) but don't the ST175/80D13 tires come in LR B (1100 lbs load ea) and LR C (1360 lbs load ea), and the ST185/80D13 tires are LR D (1660 lbs load ea) ?

    If so, wouldn't that mean that Fleetwood is equiping their product with tires that are 180 lbs UNDER the GVWR capacity ?

    I can't see why they would do that ?

    Is there a ST185/80D13 LR E ? Maybe that's what Fleetwood equips the 2008 Sun Valley with ?

    96 Coleman Sun Valley
    08 Dodge Ram 1500 QC V6
    1 Wife / 2 Kids / 1 Camping Dog

    Edited by - TX_F2 on August 07 2008 14:07:05
     
  6. ShawnBrown

    ShawnBrown New Member

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    Technically you would want the tires to be at or over GAWR (Gross Axle Weight Rating) So with LR C on your original post you would have a cusion of 520lbs. For the 2008, if you assume 10% for tongue weigth, the GAWR would be around 3150 lbs so LR D tires would work. You don't want to overload your axle any more than overloading the tires. My older pup doesn't list GVWR, only GAWR.

    Now all that is in theory. I actual run LR E (10 ply bias) and I could get by with LR C. I'm all for higher is better as tires go.

    <img src=../Images/icons/icon_smile_pu.gif border=0 align=middle alt="PopUp"> '94 Coleman Sequoia
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  7. mgwerks

    mgwerks New Member

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    TX_F2: <BLOCKQUOTE id=quote><font size=1 face="Verdana,Arial,Helvetica" id=quote>quote:<hr height=1 noshade id=quote> Please correct me if I'm wrong (I probably am) but don't the ST175/80D13 tires come in LR B (1100 lbs load ea) and LR C (1360 lbs load ea), and the ST185/80D13 tires are LR D (1660 lbs load ea) ? <hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana,Arial,Helvetica" size=2 id=quote>No, that's not correct. The "D" in the ST185/80D13 tires refers to the fact that it is a bias-ply tire, just like the "R" in 265/70R16 indicates a radial tire.

    The Load range in this size is indicated separately, and corresponds to the number of plies the tire carries. Load range C=6 ply, load range D=8 ply. The 'D' tires are more difficult to come by, don't know if there is an 'E' in this size.

    __________________________________________________________
    1999 Jayco Eagle 12SO pushing a F350 PowerStroke CrewCab 4WD long bed monster

    Here are my Jayco lift docs, they're now on the Portal for you!
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  8. TX_F2

    TX_F2 New Member

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    mgwerks:

    Thanks for the reply. I probably didn't use my words well though. I knew that the "D" meant bias-ply, what I was unsure of was if the LR D that the 3 replies I got sugessted to use were rated at 1660 lbs ea.

    96 Coleman Sun Valley
    08 Dodge Ram 1500 QC V6
    1 Wife / 2 Kids / 1 Camping Dog
     
  9. TX_F2

    TX_F2 New Member

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    <BLOCKQUOTE id=quote><font size=1 face="Verdana,Arial,Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Technically you would want the tires to be at or over GAWR (Gross Axle Weight Rating) So with LR C on your original post you would have a cusion of 520lbs. For the 2008, if you assume 10% for tongue weigth, the GAWR would be around 3150 lbs so LR D tires would work. You don't want to overload your axle any more than overloading the tires. My older pup doesn't list GVWR, only GAWR.

    Now all that is in theory. I actual run LR E (10 ply bias) and I could get by with LR C. I'm all for higher is better as tires go.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana,Arial,Helvetica" size=2 id=quote>

    ShawnBrown,

    I appreciate the reply. Now I know that you go by the GAWR and not GVWR. For some reason I got confused on which to go by. I'm all for getting more then you need, but I think a 520 lb "cushion" should be good.

    I will just stick with the LR C tires then. Thanks for everyones input.

    96 Coleman Sun Valley
    08 Dodge Ram 1500 QC V6
    1 Wife / 2 Kids / 1 Camping Dog
     

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