Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

What tire size should I use

Discussion in 'The Garage' started by mouse, Feb 25, 2004.

  1. mouse

    mouse 1/2 ton status

    Joined:
    Nov 10, 2003
    Posts:
    1,448
    Likes Received:
    0
    Location:
    Great Falls Mt
    Ok, the interior is almost complete, the engine is re-gasketed and has new card & ignition and is purring. Now I have to plan the lift. I have a set of 3/4 ton axles (D44 and 14BFF) with 4.10 gears waiting for the lift. I plan on using the Blazer for offroad adventures here in Montana. I like the look of a 6 inch lift and 35" tires, but I have to have stability when wheeling. I don't want to cut the fenders (the '77 sheetmetal is nearly blemish free!), so I am leaning towards a 4 inch lift and 33 inch tires (Procomp MTRs). If I do go the 33" route, I'll probably build a 700R4/241 TC combo for highway driveability. Any opinions?
     
  2. 78GMC1/2TON4x4

    78GMC1/2TON4x4 1/2 ton status

    Joined:
    Mar 10, 2003
    Posts:
    167
    Likes Received:
    0
    Location:
    Mount.Angel, OR
    6" with 35's /forums/images/graemlins/truck.gif /forums/images/graemlins/peace.gif
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,977
    Likes Received:
    189
    Location:
    Roy WA
    If you plan on wheeling the rig, worrying about the sheetmetal is POINTLESS.

    I say 35's all the way, 'cause a trail rig isn't going to be straight after the first real trip anyways. Minmimum lift, max tire size.
     
  4. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    If all you have is 4.10 gears and you expect to use that 700R4, I highly suggest that you use tires 33" or shorter.
     
  5. Bhintz

    Bhintz 1/2 ton status

    Joined:
    Mar 28, 2003
    Posts:
    1,341
    Likes Received:
    0
    Location:
    Roswell, Ga
    [ QUOTE ]
    If all you have is 4.10 gears and you expect to use that 700R4, I highly suggest that you use tires 33" or shorter.

    [/ QUOTE ]35s is fine w/ 4.10s and 700R4 and run 4inchs w/ 35s
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    [ QUOTE ]
    [ QUOTE ]
    If all you have is 4.10 gears and you expect to use that 700R4, I highly suggest that you use tires 33" or shorter.

    [/ QUOTE ]35s is fine w/ 4.10s and 700R4 and run 4inchs w/ 35s

    [/ QUOTE ]

    Having personal experience on that subject, I'm sorry, but it's not.

    My truck lugged on even the slightest hill on the highway with 4.10s and 35s.

    A gear chart might call it ok, but 4.10 is not enough gear for 35s with a 30% overdrive in my opinion.

    Been there, done that:

    [​IMG]
    [​IMG]

    If there's any question of my personal experience with this subject that 208 in the picture is behind a 700R4 and those pictures were taken within minutes of each other. Axles were the same ones I'm taking out right now, 4.10 geared axles from an '82 K20.
     
  7. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,095
    Likes Received:
    144
    Location:
    california
    I have 4.10's, 35's, a built th700, and a built 406 and I get away with it fine at 60mph in OD at 1600 RPMs or so but only cuz my 406 makes enough low end torque. I partly agree with Tim, a stock motor will need more gear.
     
  8. Bhintz

    Bhintz 1/2 ton status

    Joined:
    Mar 28, 2003
    Posts:
    1,341
    Likes Received:
    0
    Location:
    Roswell, Ga
    yea but do you really think its worth the 1200 to re gear
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    [ QUOTE ]
    yea but do you really think its worth the 1200 to re gear

    [/ QUOTE ]

    Nope, just run 33s and keep your 700R4 and pocket book happy. Nothing wrong with a little more cruise RPM.

    Even rjfguitar with his motor begs for more gear sometimes...with a stock motor or one mildy modified, it's horrible.

    Mine was 9.5:1, had cam, headers, duals, intake....still sucked with 4.10s. Just simply not enough cruise RPM to push that brick through the air effectively on 35s.

    If you lived in perfectly flat ground ALL the time it might be fine, but I sure thought it sucked. The slightest hill and the tc was unlocking via the vacuum switch or it was downshifting. And absolutely forget having a trailer behind it.
     
  10. mouse

    mouse 1/2 ton status

    Joined:
    Nov 10, 2003
    Posts:
    1,448
    Likes Received:
    0
    Location:
    Great Falls Mt
    Thanks for all of the input. I will be running a mostly stock 350 and TH350 behind it for the time being. The 4" lift and 33" tires should work well for the mountain trails we climb. The 203 low range works well. I wanted everyones opinion so I didn't go with the 6" lift and 35's, causing it to be too easily rolled.

    Thanks again!! /forums/images/graemlins/peace.gif /forums/images/graemlins/k5.gif
     
  11. micah

    micah 1/2 ton status

    Joined:
    Sep 18, 2003
    Posts:
    374
    Likes Received:
    0
    Location:
    Austin, TX
    i'm with Bhintz..... 35's and 4 inches /forums/images/graemlins/thumb.gif worked great for me... and that was back when i had 3.73's. /forums/images/graemlins/whistling.gif
     
  12. GONZO2

    GONZO2 1/2 ton status

    Joined:
    Jul 17, 2001
    Posts:
    137
    Likes Received:
    0
    Location:
    formerly Great Falls, MT now Lompoc, Ca
    1st off, nice to see someone else building a blazer in great falls!

    i can let you know how it will feel 1st hand with both tires.
    when i 1st did my 85 (stock 350, 350 auto) i did 4" lift and went right to 35" tires. ran good with 4.10 gears. i tried it for a short while (i was waiting for my wheels and tires to show up) with 32" tires and it like it revved too high on the highway. later i picked up an 88 (stock 350/ 700r) and just swapped everything over to it. the combination of the 700's over drive and the 35" tires makes it drop out of overdrive on the slightest incline. this would work better with 4.56 gears i think. since i also have a set of 33"s laying around i bolted those up for a few trips (5,000+ miles across country, some towing a 5,000# trailer too). does better with the 33"s but would still rather have 4.56 gears in this pig.
    the 35"s only rub when really flexed up. /forums/images/graemlins/blush.gif
    the 33"s look too small with the 4" lift. /forums/images/graemlins/wink.gif

    as far as on the trails around great falls, you'd be fine with either tire. the only time i really like the larger tires is on those snow runs. /forums/images/graemlins/thumb.gif

    now with only a 4" lift and 35"s this thing feels huge on some of the trails /forums/images/graemlins/yikes.gif ! some of those trails get pretty narrow!

    good luck!
     
  13. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,095
    Likes Received:
    144
    Location:
    california
    [ QUOTE ]
    Even rjfguitar with his motor begs for more gear sometimes...with a stock motor or one mildy modified, it's horrible.



    [/ QUOTE ]
    Yeah, on some steep overpasses or ones that are really long I will drop a few MPH's because it would like another 200 RPMs or so. If I had 4.56's it would actually be perfect, the extra 300RPM's would be PLENTY for getting over those big overpasses and not even notice plus I would be able to tow small light loads in OD fine. Plus with 4.56's it wouldn't wind up too much pulling larger loads in direct and use more gas than it needs to. Sometimes I wish I would have held out for a set of factory 4.56 3/4 axles. I am going to go with 4.88's probably and it's OK because it will give me a reason to install a locker& L/S while I'm at it anyway.. /forums/images/graemlins/thumb.gif
     
  14. mr_fujisawa

    mr_fujisawa 1/2 ton status

    Joined:
    Sep 1, 2003
    Posts:
    288
    Likes Received:
    0
    Location:
    SF CA
    [ QUOTE ]
    Ok, the interior is almost complete, the engine is re-gasketed and has new card & ignition and is purring. Now I have to plan the lift. I have a set of 3/4 ton axles (D44 and 14BFF) with 4.10 gears waiting for the lift. I plan on using the Blazer for offroad adventures here in Montana. I like the look of a 6 inch lift and 35" tires, but I have to have stability when wheeling. I don't want to cut the fenders (the '77 sheetmetal is nearly blemish free!), so I am leaning towards a 4 inch lift and 33 inch tires (Procomp MTRs). If I do go the 33" route, I'll probably build a 700R4/241 TC combo for highway driveability. Any opinions?

    [/ QUOTE ]

    i am doing my daily driver with the 700r4, 4.10's, 4" lift, 36" swamper truxus. should be a fine combo. might have to trim some sheet metal though /forums/images/graemlins/waytogo.gif
     
  15. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    Hindsight is always 20/20.

    I've never seen a stock 4.56 geared truck that was being parted out but I know they exist.

    If I ever put out the coin for gears I'm going all the way to 5.13.
     
  16. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    6" lift and 36" tires, with either 4.56 or 4.88 gears. /forums/images/graemlins/waytogo.gif
     
  17. mouse

    mouse 1/2 ton status

    Joined:
    Nov 10, 2003
    Posts:
    1,448
    Likes Received:
    0
    Location:
    Great Falls Mt
    So many different thoughts. I will be sticking with 4.10 gears in the 3/4 ton axles and the TH350 atleast through the summer. Looks like 4" and 33" are the best option. The 350 engine is about 90% stock, so larger 35" tires might be a bit much for it, even with the 4.10 - if what I'm reading is true....
     

Share This Page