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  1. #1
    Veteran Member Piston's Avatar
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    Default How do you figure the width of a tractor with "tread width" given?

    Okay, I know the obvious answer to measuring the width of a tractor, is to use a tape measure, but I'm curious how you figure out the width of a tractor you DON'T have access to measuring?

    When I look up the specs on different tractors, especially on tractordata.com, it seems like it fairly often gives the "tread width".

    I believe the tread width is the distance from the center of one tire, to the center of the other tire. So if the tread width is say, 68", then how do you figure the full width? I imagine it has something to do with half the tire width, but I'm not sure which number in the tire size is the actual width? For instance, I believe I have 19.4X24 tires on my tractor, if my tread width was 68" (I don't know if it is, just an example) then how do I figure the full width?

    I'm interested because I like to see what size implements I would need to use to cover the tire tracks at different tread widths for different tractors. (Yes, I have too much time on my hands)

    -Matt
    Kubota L4610 and John Deere 410 - WR Long 64" Grapple (best attachment ever!) QA front forks, rear forks, Brown 472 HD Rotary Mower, Land Pride RBT4096 hydro blade, Woods 7200 Power Rake, homemade 3 pt log splitter, Land Pride rake/blade combo, Land Pride HRL 3578 box blade (Hydro scarifiers), Shaver SC50 3 pt. Stumpgrinder, FitRiteHydraulics TnT, 6" Vermeer PTO Chipper (Hydro feed), Disc Plow, Ratchet Rake, LP HD25 Hydraulic PHD, Woodmizer LT15 portable sawmill
    Rear Remotes Install

  2. #2
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    Default Re: How do you figure the width of a tractor with "tread width" given?

    You are correct on tread width. The overall width would be that value plus the width of one tire as two halves are already included. See this for tire width. How to Read Tractor Tire Sizes | eHow.com
    The Opti-Mist

  3. #3
    Veteran Member Piston's Avatar
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    Default

    Thanks opti-mist!
    So just for confirmation, if I have a "tread width" of 70" and a tire size of 19.5x24 then my overall width would be 70"+19.5"= 89.5"?
    So 19.5" is the full width of one tire?
    Kubota L4610 and John Deere 410 - WR Long 64" Grapple (best attachment ever!) QA front forks, rear forks, Brown 472 HD Rotary Mower, Land Pride RBT4096 hydro blade, Woods 7200 Power Rake, homemade 3 pt log splitter, Land Pride rake/blade combo, Land Pride HRL 3578 box blade (Hydro scarifiers), Shaver SC50 3 pt. Stumpgrinder, FitRiteHydraulics TnT, 6" Vermeer PTO Chipper (Hydro feed), Disc Plow, Ratchet Rake, LP HD25 Hydraulic PHD, Woodmizer LT15 portable sawmill
    Rear Remotes Install

  4. #4
    Platinum Member
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    Default Re: How do you figure the width of a tractor with "tread width" given?

    That sounds right to me, subject to confirmation with a tape measure.
    The Opti-Mist

  5. #5
    Veteran Member MHarryE's Avatar
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    JD 7720; Kubota M135GX, NH TS115A; JD 6230; Kubota L5740

    Default Re: How do you figure the width of a tractor with "tread width" given?

    Depends on how critical the overall width is to you. My CUT has 17.5L x 24 R-4 tires. The brand on my tractor is Titan - they say the width is 17.1 inches. My Firestone off highway tire book gives a width of 17.7 inches for the same tire size. The Tire & Rim Association is the worldwide standard and gives the maximum width for each tire size but you need to pay for their yearbook. But overall width is tread width plus one rear tire width plus tire bulge.
    JD7720; KubotaM135GX; NH TS115A; JD6230; KubotaL5740

  6. #6
    Bronze Member
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    Evergreen CO
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    Ford 8N, Kubota L4240

    Default Re: How do you figure the width of a tractor with "tread width" given?

    MHarryH has it correct. I went through the same thought process recently. I live in an area with very steep terrain, and want to maximize the width of the footprint on the ground, so I don稚 tip over sideways on a slop I have to cross. I looked at a half a dozen new tractors that met my other requirements, and measured outside tire dimensions. I was interested in footprint on the ground, and the precision of measurements was about +/- ス inch. I looked at BobcCat TT440. LYM, LS, and kubota. I had previously looked at John Deere. If you are worried about total width, you have to consider tire bulge. Otherwise, taking published tread width and adding one tire width to it is pretty good. Having said that, beware: I have seen some published figures where 鍍read width was not measured from center of tire to center to tire. Also, some tractors have a camber on the front wheels, so you may have to account for that, depending upon the question you wish to answer.

    PMH

  7. #7
    Veteran Member Piston's Avatar
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    Default

    Thanks for the replies. I was curious how to accurately estimate because im wondering which of my implements I would have to upgrade when I get a larger tractor. At this time I might be okay, the only questionable one would be my 78" box blade. My mower is only 6' but I'd keep that anyways as my heavy duty mower for saplings and woods mowing, then if I ended up with a lot to mow I'd buy a bigger mower as well.

    I also have a 6' blade/rake combo but I don't consider that as I'm trying to sell it for a heavy duty dedicated blade and a heavy duty dedicated rake.

    Thanks again.
    -Matt
    Kubota L4610 and John Deere 410 - WR Long 64" Grapple (best attachment ever!) QA front forks, rear forks, Brown 472 HD Rotary Mower, Land Pride RBT4096 hydro blade, Woods 7200 Power Rake, homemade 3 pt log splitter, Land Pride rake/blade combo, Land Pride HRL 3578 box blade (Hydro scarifiers), Shaver SC50 3 pt. Stumpgrinder, FitRiteHydraulics TnT, 6" Vermeer PTO Chipper (Hydro feed), Disc Plow, Ratchet Rake, LP HD25 Hydraulic PHD, Woodmizer LT15 portable sawmill
    Rear Remotes Install

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