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How much clearance

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by CK5, Apr 19, 2000.

  1. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    Just wondering how much axle clearance certain axles have, I have 9-1/2" under a 14-bolt full float with 36" tires and 10" rims. Someone said they have 10" under a Dana 60 and 35" tires with 10" rims. Any 10 and 12 bolt axles out there with 33's or 35's?

    Steve
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    I have 33" MudRovers on 15X10s and a Dana60! I will get the mesument tonite and repost the results!!

    OK I have 9 1/4" from the ground to the bottom center of my Dana60!

    Rock ON![​IMG] 72 K5 [​IMG]
     
  3. Boss

    Boss 1/2 ton status Author

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    Ok, finally measured it last night. I got 9.5" clearance on a 12 bolt rear with 35" Meats and 16" wheels.
    Boss
    Man, I just read everyone's post and all I got is 9.5 inches on a 12 bolt? I'm gonna have to measure it again.
    Boss
     
  4. BB454

    BB454 1/2 ton status

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    What's this 10" rims? The 10" I suppose would be the width of the rim and the 15" the heigth? How wide the rim is would have a effect on the clearance under the axles?. The clearance under the rear axle of my truck with the 10bolt: 33-12.5/15 Mud BF's is 25cm and 20cm with 33-12.5/15 A/T BF's


    BB454
    IF IT DOES NOT HAVE 8 PISTONS - IT'S BROKEN !
     
  5. BIGJ

    BIGJ 1/2 ton status Author

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    I have a 12 bolt with 35's, 15x8 wheels. I measured 10 1/4 inches from the ground to the bottom of the pumpkin. 3/4's of an inch is worth giving up to me for the strength of a 14 bolt. That's why I am building one right now (plan on running 38's eventually).

    BIGJ
     
  6. Blazer1970

    Blazer1970 1/2 ton status

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    The width of the rim will affect the shape that the tire assumes when it is mounted and inflated. That will have a small effect on the mounted height of the tire. The air pressure, and the weight on the tire will also have an effect if you want to get picky.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  7. K5Junkie

    K5Junkie 1/2 ton status

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    i have 11 1/4" clearance with my 10 bolt. Running 35 BFG's on 15x10" rims. They may be weak axles but they sure do have alot of clearance, until they break[​IMG].
     
  8. 6.2Blazer

    6.2Blazer 1/2 ton status

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    Uhhh....you have less than an inch of clearance under your axle (25.4 mm = 1 inch)...do you mean centimeters (cm)?
     
  9. K5Junkie

    K5Junkie 1/2 ton status

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    that would be 11.25 inches.
     
  10. Steve88

    Steve88 1/2 ton status

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    I've got 8"......wait...what are we talking about? [​IMG] LOL !!



    Seriously, I just measured the front diff and it's 8" (also [​IMG]) from the bottom of the pumkin to the ground. I would have measured the rear as well, but I've got my dress/work clothes on and the front is easier to get to...
    That's 15x10 rims, 30x9.5x15 tires with 45lbs of air in them.

    Hey Steve, what air pressure are your tires at? I'd imagine before you hit the trails, after airing down, your clearance will be drastically affected, right?

    <font color=red>Steve88</font color=red>[​IMG]
    88K5 Silverado
    thunderdog@metallica.com
     
  11. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    Your front 10 bolt diff may be higher than the rear 10 bolt, my Dana 44 in the front I have 11-1/4" clearance. I really don't air down that much, maybe to 20# PSI.

    Steve
     
  12. 10 3/4" in the rear of the Burb with a 14 Bolt FF and
    12 1/2" in the front with the 3/4 ton 10 bolt GM Corp
    I am running 38x15.5x16.5 on 16.5x12 Bart SuperTruckers and 30 PSI

    [​IMG]<font color=red>BigBurb[​IMG]
    <font color=purple>IF YOU'RE SCARED, SAY YOU'RE SCARED !!
     
  13. BB454

    BB454 1/2 ton status

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    Blazer1970 & 6.2Blazer - Sorry guys! I must have been asleep. I changed that post to read the right way.
    MM - CM and . - ?
    Thanks for the correction.

    BB454
    IF IT DOES NOT HAVE 8 PISTONS - IT'S BROKEN !
     
  14. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    Ok this is starting to get confusing. I know with 32x11.5 inch BFG MTs I have over 9 Inches. (been about a year since I measured it). I'm running stock rims in 15x8 and 38 PSI street (DON'T say thats too high the 32's are rated 50psi so the reqire more than 32psi they have 10k on them and worn perfectly even at that pressure). Here is where the descpency I belive is comming in with guys with 33x12.5s. Since the tire is wider the side walls have more wrap to them so with the weight of the truck on them they are compressing enough that my 32's are actully the same radius to the contact patch since the side walls are more vertical. If the tire was filled to the max pressure then it would be taller than the 32.
    Well does that make sence? I still haven't made it through my first 32 ounce coffee yet so maybe I'm out of it.

    Diging it in the dirt with my K5's
    Grim-Reaper
     
  15. Burt4x4

    Burt4x4 3/4 ton status

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    What do you mean Grim??
    I don't get your point?
    I have Dunlop MudRovers 33x12.5 and I run at 35psi and the Dana60 is 91/4" from the ground....
    I too need more coffe, Ill go get some then re-read it and mabie the lights will turn on!

    Rock ON![​IMG] 72 K5 [​IMG]
     
  16. Corey-88K5

    Corey-88K5 1/2 ton status

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    I'm sorry to have to post this, but unless everybody is measuring their rearends with brandnew tires, same width wheels, same air pressure and all other issues, everybody's measurements will be different. For instance, I've had my 33 bfg's on for almost 1 year, when I had to put my spare on the front P/S, my truck felt like it was listing to the left. This is because of the wear on the normal tires.

    Just a thought. (Oh, 8 1/2" with my new tires)

    Corey
    88K5

    [​IMG]<font color=red>Girls Like Guys In Bow Ties
    http://www.geocities.com/corey_perez
     
  17. jmpd

    jmpd 1/2 ton status

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    12 bolt 33 tires on 15X8 rims
    9 1/4" clearance.
     
  18. SVBlazer

    SVBlazer 1/2 ton status

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    I just measured mine: 33 grabbers @ 35 psi on 15x8 rims = 9.25 front and 9.5 rear with 10 bolts.
     

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