Girl w/ tractor,
I take exception to your post # 11, "There are quite a few differences between the 2638 and the RK37, according to the specs. For one thing, the RK is longer and narrower.
RK37 L: 126, W: 53.5
2638 L: 119.3 W: 63.2"
I can't dispute your reference, however it is does NOT seem that this significant a disparity exists. Hope the RK Guy will enlighten. I have no affiliation w/ RK but I respect their efforts to offer quality equipment at very reasonable prices.
Were you aware that your tractor is a rebranded Mitsubishi prior to the sale,? Did the dealer disclose the fact? Again, my only interest is that RK is treated fairly, and that accuracy and unbiased descriptions of their products is fairly represented in these forums.
As for prof fatalist, he bought an economy tractor, which unto itself is just fine. Kioti does NOT dispute this is an entry level machine designed to meet a specific price point. The SE version is more comparable to the RK models, equipped w/ the bells and whistles of a premium tractor. Some folks just can't admit they did NOT purchase the most value for the money so the immediate reaction is to attack the superior value. This is childish and immature. NY Cheese did an extensive review of basic vs SE models in his recent tractor purchase thread & subsequent posts.
I too purchased an economy level Kubota tractor. Eyes wide open, I could have received more options for less cost through another brand. I do NOT diminish the other brand, because I made this choice.
If I were in the tractor market today, I would purchase an RK machine, Likely the 74 hp Cab/Power Shuttle model w/ the Deutz power plant. I would avoid the DPF emissions given a choice, since higher operating engine revolutions is NOT really my preferred style . Unless I need the RPM's for a PTO implement, travel from point A to point B is approached rather casually.
NOTE: The whole discussion over HST vs Gear and On-Highway manual vs automatic drivetrains was at best kinda silly. Once begun, there is no graceful way to retract that which should NOT have been stated or IMPLIED in the first place. Tongue in cheek often becomes foot in mouth.
EDIT:
Girl w/ Tractor,
Sincere apologies as my defending RK comment was a general comment, more applicable to prof fatalist. My concern w/ your post was simply that two tractors in the same class should be similar in overall width and that is a product of tire type, size and wheel spacing rather that axle design and cast hub width. Smaller tractors have fewer spacing options, yet still dependent upon wheel mount position? Just my experience.