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31X12.50X15 or 31X10.50X15?

Discussion in 'The Garage' started by joshkbomb, Dec 18, 2003.

  1. joshkbomb

    joshkbomb 1/2 ton status

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    I'm going to be getting new wheels and tires for my stock '87 blazer, and I have people telling me both widths. I think I'm leaning towards the 12.50's because the more in contact with the road the better. Also, I am looking at the Pro-comp A/T's(mainly a DD), any comments on these or alternatives? /forums/images/graemlins/thinking.gif
     
  2. clubba68

    clubba68 1/2 ton status

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    12.50's
    I have no experience with the ProComps.
    -Andrew /forums/images/graemlins/usaflag.gif
     
  3. unick

    unick 1/2 ton status

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    12.5 The way I see it the wider the better. I want to get 15.5's someday but that wont b till I put at least 40's on it.

    Nick
     
  4. scrappyk5

    scrappyk5 1/2 ton status

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    WIDER IS BETTA /forums/images/graemlins/thumb.gif
     
  5. Bhintz

    Bhintz 1/2 ton status

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    why not 33s or 32s, to me they look a lot better 31s look so small
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I'll 2nd that, 33x12.50. /forums/images/graemlins/thumb.gif
     
  7. Z3PR

    Z3PR Banned

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    Get the wider ones.
     
  8. joshkbomb

    joshkbomb 1/2 ton status

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    Will the 32's or 33's fit without rubbing?
     
  9. paveslave

    paveslave Registered Member

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    I've found 12.50s tend to try to follow the ruts of the road and wander a bit on road. I now run 33/10.50s and the road manners seem much better, comparable to standard size tires. Also (forgot to look where you're at) if you run in snow and ice I would think the thinner tire would work better. I'm kind of biased towards BFG's myself. My 2c /forums/images/graemlins/k5.gif
     
  10. clubba68

    clubba68 1/2 ton status

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    [ QUOTE ]
    Also (forgot to look where you're at) if you run in snow and ice I would think the thinner tire would work better.

    [/ QUOTE ]

    Yeah, fill out your profile so that we know where you are at. There might be some guys around ya too. /forums/images/graemlins/thumb.gif
    -Andrew /forums/images/graemlins/usaflag.gif
     
  11. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    I've found 12.50s tend to try to follow the ruts of the road and wander a bit on road.

    [/ QUOTE ]
    It's terrible with 35x16 boggers /forums/images/graemlins/rotfl.gif
     
  12. JIMs70K25

    JIMs70K25 1/2 ton status

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    Try 325-60R15 BFG All Terrains. 11" of tread surface look good on 10" wide rims. Saw a K5(stock) with a set not 30 minutes ago, looked good. Had them on my 70 before the lift, pics in link.
     
  13. GONZO2

    GONZO2 1/2 ton status

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    with stock springs i ran 32 11.5's on my 85 without any rubbing. the springs on this were sagging pretty good too.

    when the 88 was on stock springs it was able to clear 33 12.5's with only minor rubbing on the running boards when flexxing the front up. probably would not of rubbed had it not been for the runningboards.

    if you have enough gear go for the 33 12.5's they get more /forums/images/graemlins/thumb.gif
     
  14. Bhintz

    Bhintz 1/2 ton status

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    I ran 33x12.50 stock w/ no rubbing
     
  15. CHEVY 4WD

    CHEVY 4WD 1/2 ton status

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    I would go with either a 32x11.50 BFG AT or a 33 12.50
    If you dont want to go up to a "big tire" like a 33 then get a 32 there pretty small still/forums/images/graemlins/thumb.gif
     
  16. joshkbomb

    joshkbomb 1/2 ton status

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    if you have enough gear go for the 33 12.5's they get more

    That's another thing, if I went to a 33, would I have to worry about gearing or any ill effects in driving it everyday?
     
  17. dyeager535

    dyeager535 1 ton status Premium Member

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    [ QUOTE ]
    That's another thing, if I went to a 33, would I have to worry about gearing or any ill effects in driving it everyday?

    [/ QUOTE ]

    Depends on engine, tranny, and current rear axle ratio.

    I've got/had a 350/465/3.42's/33's. No problems. Was/is no speed demon, but didn't really ever wish for more gearing. Fast enough for a truck. Highway RPM was about 2250@60MPH, which was about perfect IMO.

    Had an '83 with 305/700/3.08/31's, and it was a slug no question about it.

    PERSONALLY I think 31x12.5 would look ridiculous. All that width with no height? Look like some ricer setup.

    Depending on application (especially DD) a narrower tire is probably going to work better. Less contact patch yes, but better economy, less noise, and less chance of hydroplaning in water. Light unpacked snow, or shallow mud, the narrow tire wins. If you can't get to the bottom, get a wider tire.

    I have nothing but praise for my BFG 33x10.5R15's. Wear great, not noisey (IMO), fit stock wheels fine, no clearance issues in most stock rigs, and fairly easy to find.

    Kind of pricey, but I thought it was worth it. A mostly sotck daily driver that sees little to no off-road use would be a prime candidate for these, IF the gearing and engine could tolerate it.

    For a 350/700 truck, I'd say 3.42's are a bare minimum for 33's though. Anything less and you'll hate city driving. (besides, Overdrive would be even more worthless than it is already)

    The axle ratio code is in the glovebox on the sheet there. G80 is a Gov-lock (traction aid in the rear axle) if it's present, and any other G code will be axle ratio.
     

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