TOM H. - In my post I mentioned the space between the duals filling completely UP with mud.....any guess how We got all that mud out? Sometimes it took a couple days to dry up but eventually with enough road work in high gear most of it would be gone. The BIG chunks would roll around for a while till they broke up and wear most of the stuck-on stuff off the wheels & rims. We always ran the duals about 5-6 inches away from the prime wheel equip. since most of our equipment was small and We were farming 38" rows. The BIG stuff now set for 30" rows the prime tires are set in almost inside the fenders and the duals are most times over a foot away.
I never ran anything with steel wheels, Don't think I'd like to start either! Rubber tires soak up a LOT of bumps.
RICHARD P. - Narrow frt ends, tricycle frt's were part of the FARMALL FARMING design, It let all manner of mounted equipment be put on farm tractors, things like cultivators, and especially mounted corn pickers. It wasn't until the mid-1960's that WFE's became more popular as tractors became bigger and rear-mount cultivators and combines became the normal equipment. By the late 1970's FARMALL would only build about twenty NFE tractors per YEAR, two batches of ten twice a year, mostly small tractors like 786's or 886's. Everything else was WFE and the Elwood FWA was produced at 100 to 200 per year, unfortunately IH didn't market FWA very much because it competed with the 2+2 it released in 1979, it was an articulated row-crop tractor with all four wheels the same size.
With the size of the ag tractor industry years ago the tire companies pretty much made whatever the tractor companies wanted, case in point, when the 1206 was developed, the largest current rear ag tire couldn't handle the HP the tractor produced so Firestone developed the 18.4 & 20.8 X 38 tire size for IH. The rim would spin inside the tire shearing off the valve stem under hard pulls without duals mounted.
Your comment about "Pushing & Pulling confuses Me" Think of tires as "Driven and NON-Driven" Are the tires pulling the load or coasting. Pulling tires run "Forward", coasting tires run "Backwards".
When I mow with my Firestone lugs I can see the grass depressed with the 26-12.00 X 12's on the 982, the lugs are closer together on my 23-8.50's on the 72 and I can still see the grass depressed for a while, maybe a day, but then the tracks disappear. Reason I run lugs is because when I get to a slope or damp spot around a ditch or whatever I don't spin a bald spot in the grass like most turf tires will do. They also ride better, and unless I'm pushing snow on my concrete drive I never have to run chains to increase traction. I have chains for every tractor (FARMALL's included) except the 982 but I don't really like mounting or using them unless I need the traction. They're too hard on my concrete driveway.