John Deere G
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Thread: John Deere G

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    John Deere G

    I just bought a 1950 John Deere Model G. I want to put dual rear wheels on it. It has 13.6 x 38 rear tires that I believe are on 10 x 38 rims. It has a 12 spine axle and the wheels appear to have 9 lug holes.I have the opportunity to buy another set of wheels off a John Deere B with 12 spline axles. Are they the same? Will the cast iron center fit both tractors?Will the 9 lug hole B wheels fit on the Model G?

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    Senior Member Wi11y's Avatar
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    I dont know about the splines. My hunch is (only because I have never done it) there is a cast iron ring of some sort type spacer that will be required to mount the wheels in a dual configuration. Most tires do not like to be mounted hard against each other and require a spacer. This in part is because of tire inflation as well as sidewall flex. If tires were mounted sidewall to sidewall they would wear each other out in less than 20 miles.
    If it isnt broken, dont repair it.

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    Moderator wizzard's Avatar
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    pretty much all 9 bolts rim are the same. ive put IH 9 bolts on deere's and oliver rims on massy's. 13.6-38's don't do a G any justice heck there not even that good on a B lol if it was me id find a set of 14.9-38's or 15,5-38's for that G and youd be amazed at the work it'll do. just yesterday I was pullin 3-16 trailer plow with our B with 15.5's without any trouble threw sod!
    Last edited by wizzard; 05-07-2017 at 01:35 PM.
    Bert.

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    12 Spline Axle

    "Will the cast iron center fit both tractors?"

    Take a look at the photo below of the 12 spline axle on our 43 Model B.
    IMG_4051.JPG

    Note the diameter is approximately 2 3/8 inches.

    You might consider measuring the diameter of the axle on your Model G and compare both measurements.

    Pure speculation on my part, but the diameter of the Model G axle will probably be larger.

    Hope this helps.
    A man only learns in two ways, one by reading, and the other by association with smarter people. Will Rogers

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    I have read that you can go with one size rim smaller or larger with a tire. So if I went with 15.5 x 38 tires I could use a 14 inch rim or a 16 inch rim? Please advise.

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    What size rim would I need for the 15.5 x 38? I have read you can go with one size smaller or one size larger rim than the tire. Would that be a 14 inch rim to a 16 inch rim?

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    Model G Rim Size

    What size rim would I need for the 15.5 x 38?

    Take a look at the diagram below of the RUBBER TIRE REAR WHEEL EQUIPMENT for the Model G.

    Rear Whee;.jpg

    Note the largest demountable rim size for the Model G is 12-38.

    Reviewed the Antique Farm Tractor Tire Size Conversion Chart and the 12-38 tire “equates” to a 13.6-38 modern tire.

    Note that there is no “antique” tire size that equates to a 15.5.

    The 15.5 will mount on the 12-38 rim, but it will “appear” to be tall and wide.

    We have two Model 70 tractors with 15.5 tires.

    I have read you can go with one size smaller or one size larger rim than the tire. Would that be a 14 inch rim to a 16 inch rim?

    Yes.

    Hope this helps.
    A man only learns in two ways, one by reading, and the other by association with smarter people. Will Rogers

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    Moderator wizzard's Avatar
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    we got 16inch wide rims with 15.5's on the JD B. works awesome. they came off a 966 or 1066 ih
    Last edited by wizzard; 05-11-2017 at 10:31 PM.
    Bert.

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    Thank you very much for the information.

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