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How much cutting for 38s?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by DesertDueler, Oct 9, 2001.

  1. DesertDueler

    DesertDueler 1/2 ton status

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    I am looking into some 38x14.50 or 38x15.50 for my Jimmy. It has a tuff country lift on it with 4" springs in the front and 6" in the rear. It sits about level now at about 5.5" because I have no top, doors, or windows. Anyways I was wondering how much cutting I will have to do, or what size should I go with (bigger than 35s)?

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  2. lax037

    lax037 Registered Member

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    I'm running 42's with a 4" lift
    Cut out a nice amount, and requires the removal of the fender wells, front and rear. I cut way more than I needed to on both
    My buddy is running 38.5's on his burban with a 4" lift with the trimming from the tech section, but they are real close
     
  3. DesertDueler

    DesertDueler 1/2 ton status

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    Would 37s be a better choice then? I want to keep my rear wheel wells. I want to go as tall as possible because when I air down I loose alot of ground clearance with my 35s (actually measured 34" when fully inflated). I am only running 1/2 ton axles (10 bolt front, 12 bolt rear) so I wont go any bigger than 38s. I know you guys say 37 or 38s are too big for 1/2 ton axles, but I probably weigh under 4,000 now.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  4. DesertDueler

    DesertDueler 1/2 ton status

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    top

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  5. zakk

    zakk 1/2 ton status

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    i dont think you are losing that much. I ran 35's with my 1/2 ton gear and never had a problem. I have a problem now cuz i have 36's with a 14 bolt in the rear...

    -Zakk
    '77 K5 SB 400 TH350 NP203 p/t 6" Lift D60 14BFF 4.10's 36"Wrangler II's

    [​IMG] MOAB 2002 OR BUST!! [​IMG]
     
  6. DesertDueler

    DesertDueler 1/2 ton status

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    The bottom of my old 10 bolt rear looks loke I shaved the bottom off, thats how bad I have hit it. I need a few more inches to help clear.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  7. CaptCrunch

    CaptCrunch 1/2 ton status

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    I think if you cut like steve did you could run 37's. Steve has about 4" of lift plus ORD shackle/D60 front that gives another inch and then he has the ORD zero rate in the rear I believe... so 5" all around. I'd say cut as much as you feel comfortable with and get the tires... then try and find a ramp or a forklift to check stuff out. If you need more a 1" ORD body lift should clear em.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  8. DesertDueler

    DesertDueler 1/2 ton status

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    I found a set of four 38.5x14.50x15 tsl sx with a 38x12.50x15 tsl sx for $700. They have over 3/4 of the tread left also. I just want to know how much before I buy them and decide I have to cut too much.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  9. 77Blazer

    77Blazer 1/2 ton status

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    I run those exact sx tires with a 4" lift with no probs but i did do alot of fender trimming but nothing totally extreme and no i dont rub.

    350, sm465, NP205, 14ff w/detroit, yucky ten bolt 4" springs,38.5x14.5 swampers
    <a target="_blank" href=http://www.planettribes.com/theden/gontw/nsig.jpg>http://www.planettribes.com/theden/gontw/nsig.jpg</a>
     
  10. DesertDueler

    DesertDueler 1/2 ton status

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    Did you have to get rid of your inner fender wells or did you just trim them, or move them back? BTW how do you like those tires?

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  11. 77Blazer

    77Blazer 1/2 ton status

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    I just did all the trimmin i could while leaving the inner wheel well in tact. As far as the tires go I have had them since feb of 2000 and they still have 3/4's of the tread left and they kick butt in the mud. Boggers are next though only because my blazer wont be my daily driver as of next month otherwise i would be sticking with the sx's

    350, sm465, NP205, 14ff w/detroit, yucky ten bolt 4" springs,38.5x14.5 swampers
    <a target="_blank" href=http://www.planettribes.com/theden/gontw/nsig.jpg>http://www.planettribes.com/theden/gontw/nsig.jpg</a>
     
  12. DesertDueler

    DesertDueler 1/2 ton status

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    Any body else run these tires and this lift? Or just the on the tires, how long do they last mileage wise?

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  13. blazbrnc

    blazbrnc 1/2 ton status

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    I just put 38.5"x14.5" sx's on my k5 with about 4" of lift. I cut the leading and trailing edge of the front inner fenders out and welded in some sheet metal in at a better angle for more clearance. The fenders are cut, but nothing excessive. I think you could put at least 40" inch tires in the back without having to screw with the inner fenders.

    '79 K5, '79 Suburban, '76 Br**co, 77 K20
    '99 BB 4x4 Suburban to tow more junk home
     
  14. DesertDueler

    DesertDueler 1/2 ton status

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    Thats good to hear because I want to keep my back seat. I think I will be getting them.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     

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