Why do subcompact tractors have small wheels/tires?
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    mike01's Avatar
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    Why do subcompact tractors have small wheels/tires?

    I've often wondered why subcompact tractors have small wheels and tires. Why does that seem to be a hard and fast rule? Is it a marketing thing? So as not to scare people going from lawn or garden tractors into subcompacts? Or is there an actual advantage to them?

    I know that smaller wheels give you a tighter turn radius, but is there a reason why they can't keep the front wheels small and just make the back wheels bigger by changing the 4WD ratio? Like...why 26" Why not 29"? Or whatever.

    Would a 1025r/1023e with 29" rear tires mow any worse or turn any less tightly than what it does now? Wouldn't that just give it more traction and less soil compaction? And wouldn't that make it better as a mower?

    Any thoughts?
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    That is my only complaint about my 1025, it just looks so lame with the small tires. I'm betting it is a center of gravity issue with these real small frame tractors. They would have to redesign the transmissions to move up the drive shafts at least.
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    Quote Originally Posted by Jeff B View Post
    That is my only complaint about my 1025, it just looks so lame with the small tires. I'm betting it is a center of gravity issue with these real small frame tractors. They would have to redesign the transmissions to move up the drive shafts at least.
    I agree that center of gravity issues are likely at play here and would keep significantly taller tires off the current chassis. I wonder if future chassis redesigns could possibly incorporate taller tires.

    Considering the actual displaced area of tire on the road I do wonder how much more actual weight per surface area of tire patch larger framed 2 and 3 series actually put to the ground compared to the much lighter 1 series but with a much smaller total tire patch area, if any?
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    Slap some impressively large wheels/tires on it and some would opt for the lesser $ machine over a larger bigger buck model. As the phrase goes... "...it's marketing, marketing." Don't forget who a lot of these tractors are pitched to (see brochures) sharp lookin' ladies in white shorts doing their "estates" who don't want to hear from neighbor woman, "Oh, Martha, your lawn mower has such big clunky tires and my HUSBAND mows MY lawn!"
    Last edited by HydroHarold; 05-31-2017 at 11:09 PM.
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    Quote Originally Posted by HydroHarold View Post
    Slap some impressively large wheels/tires on it and some would opt for the lesser $ machine over a larger bigger buck model. As the phrase goes... "...it's marketing, marketing." Don't forget who a lot of these tractors are pitched to (see brochures) sharp lookin' ladies in white shorts doing their "estates" who don't want to hear from neighbor woman, "Oh, Martha, your lawn mower has such big clunky tires and my HUSBAND mows MY lawn!"
    Hahahaha, first time I showed my dad how the deck goes on and off he said that good looking broad on the TV sure makes you look like a rookie!!


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    From what I remember, the mower deck on the 1026R just fit between those small wheels. Bigger wheels would require a longer tractor.
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    JD did make a bigger tired SCUT. It is/was the 4110, 2320, etc. Not sure if the 2025r now serves that same role or not. It is apparent if you want a bigger tire you need to go with a different model of tractor.

    The 1 series is logical step up from the garden tractor X7 series. Also the 26x12x12 tires have been sort of an industry standard since the GT class and the SCUT class were created. They came standard on the 400 series GT's made in the 1980's and it was those size of GT's that evolved eventually into the X7 and SCUT class. It sure made it easier and more economical for JD to design a SCUT with commercially available tires rather than having another industry create another size tire.

    Now that a 1 series has real trans oil cooler versus a fan I would not be that concerned about the ground clearance a bigger tire creates.
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    Quote Originally Posted by 69project View Post
    JD did make a bigger tired SCUT. It is/was the 4110, 2320, etc. Not sure if the 2025r now serves that same role or not. It is apparent if you want a bigger tire you need to go with a different model of tractor.
    The 4110 and 2320 were classified as Compact Tractor, not Sub Compact. Same with the 2-series 2025R.

    I could be mistaken but I believe the only JD tractors in the Sub Compact class are the 1-series.
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    Quote Originally Posted by ChrisR View Post
    From what I remember, the mower deck on the 1026R just fit between those small wheels. Bigger wheels would require a longer tractor.
    That's a good point. And a longer wheelbase means larger turning radius. However, the 54D (not sure about the 60) could easily clear 27" or 29" tires, and it's not like those tires aren't available. Mahindra uses them, as does TYM (who build some of Mahindra's tractors).
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    Quote Originally Posted by tommott77 View Post
    I agree that center of gravity issues are likely at play here and would keep significantly taller tires off the current chassis. I wonder if future chassis redesigns could possibly incorporate taller tires.

    Considering the actual displaced area of tire on the road I do wonder how much more actual weight per surface area of tire patch larger framed 2 and 3 series actually put to the ground compared to the much lighter 1 series but with a much smaller total tire patch area, if any?
    It'd seem quite tippy with taller tires on these machines, they're not that wide. How tight does your A$$ pucker???
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