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Thread: Brake Drum Size

  1. #1
    Jr. Apprentice
    Join Date
    Mar 2009
    Location
    Edgerton, OH
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    Default Brake Drum Size

    Without removing the rear wheel is there a way to tell whether I have 10" or 11" drums?
    My VIN is 1GCEK14R2VE205747.
    1997 K1500 Silverado 5.7L
    1985 MB 300D 'Margaret' 253,000 miles
    1985 MB 300D California version 'Maybellene' 268,000 miles (death by deer at high speed)
    1981 MB 300D 'Madeline' 238,000 miles
    1991 MB 300SE 'Alarice' 158,000 miles

  2. #2

    Default

    1GCEK14R2VE205747VIN:1GCEK14R2VE205747Year:1997Mak e:Chevrolet TruckModel:K1500 1/2 Ton 4WD - PickupEngine:5.7 L 350 CID V8VEHICLE INFORMATIONCountry:UNITED STATESMake:ChevroletVehicle Type:Pickup TruckModel:K1500Engine Type:V8, 5.7L; CPIYear:1997Assy. PlantPontiac, MIProduction Seq. Number:205747Body Type:2 Door Cab; RegularTrim Level:BaseDriveline Type:4WDGVWR Class:Class E: 6,001-7,000 lbBrake System:HydraulicSeries:1/2 tonVehicle Class:Full-size PickupEngine Series Code:WRN L31Fuel Type:GasolineManufacturer:General Motors CorporationEngine Code:R
    I CANT THEY LIST BOTH SIZES

  3. #3

    Default

    Why don't you want to pull a wheel?
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
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    Pro Comp Programmer
    Bilstein Shocks
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    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  4. #4

    Default

    If the Max diameter is stamped into the drum in a convenient place, and you can see through the gaps in the wheel, and one of those gaps is in a convenient place, then you would be able to read the max diameter off the drum without removing a wheel. Otherwise, the easiest (and most of the time quickest) way to find out is to pull a wheel and see what is stamped into the drum,
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  5. #5
    Legend Mean_Green_95's Avatar
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    Apr 2009
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    Baton Rouge, Louisiana, United States
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    Default

    I would 10, A guy I know has the a Z-71 and he has the 10in drums too.
    2010 Equinox LT
    2.4, 6 speed auto, power lift gate, remote start, bluetooth, xm.

    1995 Cheyenne C1500 ext. cab(my baby, my first truck)
    5.0, 5 speed, Silverado appearance package, power nothing, bucket seats and console Silverado, painted black interior, eBay halo headlights, eBay chrome tails, eBay cai, dual Flowmaster 40's w/no cats, 15x7 American Racing Hopsters, Walmart fog lights, SS mirrors

  6. #6
    Jr. Apprentice
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    Mar 2009
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    Edgerton, OH
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    Default

    Quote Originally Posted by Jimmiee View Post
    Why don't you want to pull a wheel?
    I was hoping to only pull the wheel when I go to replace the brakes.

  7. #7

    Default

    Quote Originally Posted by ncof300d View Post
    I was hoping to only pull the wheel when I go to replace the brakes.
    Murphy's Law says if there are 2 choices you will always get the wrong one, <G> Another reason to pull the wheels is you may need a hardware kit and if you don't pull the wheels,, you will need wheel cylinders for sure!

  8. #8

    Default

    most likely you have 10in but like jimmiee said if you dont look it will be wrong

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  9. #9
    Jr. Apprentice
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    Mar 2009
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    Edgerton, OH
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    Default

    I changed the front brakes an now I want to take care of the rear. I pulled a wheel and I did not see a 10 or 11. I did find a part number 15588223. I googled the number but could not find out which size. Any guesses? I held up a tape and I am guessing that they are 10' drums.....just want to confirm.

  10. #10
    Sr. Apprentice
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    Nov 2009
    Location
    Grandview, WA
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    Default

    You can also measure the thickness of the drum. There is over 1/4" difference in thickness between the 10" & the 11" shoes. The 10" x 2.24". The 11" x 2-3/4".

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