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tires for a 3.73

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by FatBoyBlazer, Feb 24, 2001.

  1. FatBoyBlazer

    FatBoyBlazer 1/2 ton status

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    I am thinking about geting a suspention lift and a body lift on a 91 blazer with 3.73 rear gears that was just rebuilt. I want to give it at least a total of 8-9 inches of lift and also new tires. The Tires that i have now are remington mud brute. They are 32x11.5 15. What is a good combo?
    [​IMG]
     
  2. bigerik

    bigerik 1/2 ton status

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    If it were my truck I would put no larger than 33 or 35" tires because I like to have a torquey combo. I have seen a picture of a 73-91 Blazer w/ 35" tires, and it looked great. I have 5.13s on both my trucks (3 speed autos) and run 38 to 39.5 tires, and I wouldn't want a higher gear ratio (wish I could get lower, but have 14FFs). Good luck!
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Whats wrong with it now? It looks really nice to me. You're only setting yourself up for headaches with that oversized stuff. Unless your doing some trail running, I'd leave it. 3.73s with 32s is a nice setup, if you get the monster tires you're gonna need something like a 4.56.

    Two lanes wide, twelve yards long, sixty-five tons of American pride....Canyanero!
     
  4. MudFrog

    MudFrog 1/2 ton status

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    Even with just street use (not sure if you wheel or not) if you go to a 38/39" tire your gonna need to beef your axles and get rid of the 3.73's. That combo will tear your tranny apart (assuming you still have the 700R4). You would probably need 4.88's or something in that general range.

    89 K5 Silverado
    <A target="_blank" HREF=http://mudfrog.coloradok5.com>http://mudfrog.coloradok5.com</A>
     
  5. Jason73K5

    Jason73K5 1/2 ton status

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    I'd go with 35's. I used to have them with 3.08 and liked it, so 3.73's should work fine.
     
  6. UseYourBlinker

    UseYourBlinker 1 ton status

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    I was running 33/12.50/15 for about 2 years with 3.07. I just changed them to 3.73 works great.

    <font color=blue> I'm down with the clown, till I'm dead in the ground.</font color=blue>
     
  7. 84K5WITHAJUNK305

    84K5WITHAJUNK305 Registered Member

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    The biggest I'd go with a 3.73 would be a 36, anything bigger and you'll want lower gears
     
  8. Blazer79

    Blazer79 1/2 ton status

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    I'm going from 3.07 to 3.73 soon just to be able to use 33" tires (currently 31x10.50 that are actually 29"). If I wanted 35" tires, I'd probably go with 4.11.

    Use a rpm calculator such as this one: <A target="_blank" HREF=http://www.4lo.com>http://www.4lo.com</A> so you can determine how the rpms will be affected with each swap.

    <font color=blue>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A>
    </font color=blue>[​IMG]
     

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