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  1. #1

    Default Tire size fitment question

    hi i have a 2003 lifted chevy truck with a 6 in superlift and 3 in body lift, i need new tires and was wondering if a 37 14.50 would fit under it without rubbing. i have 35 12.50's on it now my wheels are 10 in wide. need some advice.
    thanks

  2. #2

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    Welcome!

    I'd expect you'd have to trim. However, that's just a suspicion, as I've not dealt with tires that large, before. By the way, I seriously hope you're changing your gear ratios as you're moving up (so that your truck maintains some low-end grunt instead of becoming a dog) and that this is on a 2500 HD or better and not a 10-bolt 1500! (I'd be worried about the rear diff on a 1500 and also concerned about snapped axles on a 1500...)

  3. #3

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    Welcome to the G M T C !


    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    ===============
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  4. #4

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    Welcome to the club, it's good to have you aboard.............


    2002 Chevrolet Silverado Extended Cab SportSide: See Mods in My Garage

  5. #5

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    to the GMTC

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  6. #6
    Jr. Mechanic BillM's Avatar
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    Default

    I can't answer that, but welcome to the club.
    Bill M. Blown 2003 Tahoe Z71

  7. #7
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    mfleetwood's Avatar
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    Default

    Thread title changed to relate to topic and moved to this section.


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    TIRES:
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

  8. #8

    Default

    The truck is a 1500 with stock gears and axles, there's 186k on the truck now and hasn't had any problems as far as axles go, thanks for the help

  9. #9
    Jr. Apprentice weswins's Avatar
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    Default

    Hey, I work at a truck accessory shop and can tell you without a shadow of a doubt that those tires WILL RUB.
    This being said, they will rub on the rear of the splash guards on the front wheel wells and a small amount on the front bumper. If you do not trim these parts, your tires will quickly take care of that for you the first time you head offroad.
    As far as axles, drive it nicely, dont try burnouts on dry pavement and dont expect much longevity on hardware if you wheel it offroad.

    After all that, do it and enjoy it, there isnt much harm you can do in upsizing tires after 35's, the stress is already there.
    Full throttle is never enough!
    1994 Silverado Z71 1500 (everything but leather)

  10. #10
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    mfleetwood's Avatar
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    With stock gears (I'm assuming 3:73s?), your truck is pretty sluggish with those 35s already. As @SurrealOne mentions, a changing of the gears should be something you are considering as well if you are moving up another 2" or so in diameter.

    There is also a rule of thumb regarding tire width as it relates to rim width. I can't remember exactly what it is (someone will probably respond with the info if you need it) but I think if the tire is 4 1/2" wider than the rim, that may be too much and you'll have to change rims as well.

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