Tractors must operate on unimproved ground where traction is difficult to come by. The large tires permit the relatively low power of the tractor to pull by avoiding most slippage.
they have large tires so they don't get stuck in mud and soggy grass
Larger tires mean better weight distribution, higher ground clearance and are better for carrying the machine's heavy weight (especially over the machine's lifespan). The trademark grip on a tractor's tire is for soft earth. The weight of the machine, alongside the ballast (liquid inside each tire that adds weight), push the grip into the soil, allowing the machine to pull itself forward.
Farmer's don't usually operate in mud, as most crops should be planted in relatively dry conditions. Although tractors can operate in mud, they have limits. Mud can build up on the tires, covering the grip, decreasing traction. The slippery texture of mud doesn't help with traction either, as does the vehicle's weight, which causes it to sink into the mud. The worst limit is the implement behind the tractor; it can sink in and 'anchor' the tractor in place.
tractors are having broad tyres because larger area will be occupied which will reduce the pressure so ,the tractors can move easily in sandy soil.
Tractors have big rear tires because ,the larger the surface area of the tractor's wheels touching the ground, the more pulling power you have. Like how tractor pullers have large tires. Another reason is that the tractor doesn't have to operate at a higher speed to get the same ground speed with larger tires. Gear ratios don't have to be as high b/c of the larger tires.
for traction
so they can go through mud
Tractors have small tires on the front to make it easier to steer the tractor. Large tires are harder to steer. The large tires in the back allow the tractor to have more power as it plows.
Wal-Mart sells tires for lawn & garden tractors, such as lawn mowers and similar types of equipment. However, they do not sell large scale tractor tires.
Case
Tractors need to move heavy loads across soft earth surfaces. Large tires increase torque, increase effective surface area for better traction, and are less likely to get bogged down in potholes, gullies, or other surface irregularities.
so it can move
Some farm tractors that have small wheels in the front and larger wheels in the back is to help farmers pull larger equipment. The large tires have more traction and the smaller wheels help to steer.
There are two main types of tractors that are used. These tractors are large farming tractors and small personal tractors.
Farm tractor tires need to be wide and large in order to carry heavy loads. They should also be stubble resistant. The choice between the use of tires with tubes and tubeless tires also needs to be considered.
GP stands for General Purpose They had tires so they could be operated on roads.
Tractors have broad tires because there is more contact with the ground and less compaction. The bigger the tractor tire the narrower it is a 52" tire is narrow but we have a 32" tire that is 34" wide.