Firestone Agricultural Tire has a descent explanations of tires and types.
i filled out online brochure on there website, to get a tire catalog. and fairly good amount of pages and tire treads to choose from.
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remember with 4x4, 4WD, or MFWD tractors. if you get different tires, for rear or front, then you will need to get all 4 new tires most likely. so the rolling circumference stays the same. mis match front and rear tires, could possibly destroy the drive train on tractor.
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something to think about.
tires are made out of rubber. and act like a balloon. the more PSI of air pressure, the more they expand, this can change the physical actual diameter of tire.
the lower the PSI of air pressure in tire, the flatter the tire could become reducing the physical diameter of tire some.
more weight that is placed on a tire at a given PSI of air pressure in tire. will physically change tire dimensions. were tire rests on the ground. have seen a few to many pickup truck rear tires look like a pancake, when someone wanted to fill rear with a bunch of wood, or something heavy.
because tires dynamically change, based on air pressure in tire, temperature of air inside tire, and amount of weight being placed on tires. manufactures do not give a bunch of numbers. for all possibilities.
instead they give, rim diameter, width of tire, and wall height, radius perhaps diameter of tire, some times dimensions are in inches, some times in metric, sometimes you need to do some math to figure out tire dimensions.
lets not forget, same tire, might work on a couple different widths of rim sizes. one tire might fit a 11" width rim, or a 12" width rim. rim diameter being say 24" in diameter. width of rim can cause tire to physical change dimensions again...
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then you have tractors marketed to specific markets. "gearing ratios" smaller diameter tires = slower speed but more torque, larger diameter tires = higher MPH but less torque.
larger diameter tires might give more ground clearance under tractor, but can dramatically change COG (center of gravity) of a tractor, causing higher chance of roller tractor over.
specific markets might be riding lawn mower on steroids, that does good mowing, but enough weight, and some extra traction for small gardening, snow pushing and like.
specific market might be, less about mowing the lawn, and more about being a utilty tractor, to get everything else done besides mowing. perhaps given model number has option for a FEL (front end loader), or a better rear end hitch (3pt hitch)