Where as tyres of other vehicles are of same sizes in front & rear.
2006-10-20 04:54:30 · 8 answers · asked by deepak57 7 in Science & Mathematics ➔ Engineering
Small tires (front) have less friction when turning, so the steering wheel isn't too difficult to spin. Large tires with deep treads provide traction on soft/slippery surfaces and the large diameter lets them span rough terrain without dropping into holes/ruts.
Do note that tractors have independent brakes on the two sides and sharp turns are made by planting one side of the vehicle with the brake on the side you are turning toward.
Aloha
2006-10-20 05:11:08 · answer #1 · answered by Anonymous · 2⤊ 0⤋
It is not required that all four wheels are the same diameter (or the three
wheels on a tricycle or the two wheels on a motorcycle or bicycle). In fact, early bicycles had very large diameter rear wheels. It is a convenience if all wheels are the same diameter as then only one spare tire is necessary.
The early bicycles had a large diameter rear wheel, which supported most of the weight of the rider, in order to smooth the ride. The larger the diameter, the less the rider is jostled by bumps in the road.
This is also part of the reason for large diameter rear wheels on tractors. I suspect an even more important reason is to support the tractor on soft and muddy fields. It is also easier for the tractor to avoid getting stuck in the mud if the wheel is larger.
2006-10-20 04:57:23 · answer #2 · answered by DanE 7 · 0⤊ 0⤋
A Farm tractor at full speed might be able to go almost 20 mph and the reason for this is to move the piece of equipment to the land you are wanting to work (plow, till, cultivate,etc.) Once you are working the tractor tilling the soil, etc., it may go as fast as 2 or 3 mph, but it requires a great deal of power to accomplish the tractors tasks, thus the giant wheels and the super low gear ratios. Also the giant wheels allow the tractor to work in wet fields by not allowing it to sink too far.
2016-05-22 05:10:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Think about weight. Horse power. Co-efficency of friction and application.The large Tires are used to propel the machine, Small tires are used to guide the machine. Tractors are geared low to support heavy loads. They may be turned by use of the front tires or by applying brakes associated with the rear tires. Turning radiuses can be as low as zero degrees. Taking all of these things into consideration, it would be difficult to engineer a vehicle that did not include smaller tires in front
2006-10-20 13:25:31 · answer #4 · answered by kalspa55 1 · 0⤊ 0⤋
Different Tractors
2016-12-14 19:35:12 · answer #5 · answered by ? 4 · 0⤊ 0⤋
The tyres of the tractors have diferent sizes in order to increase te power of the tractor in a working field.The biger the radius of the tyte the higher the power.Thi is due to something called torquo.(torquo= targental force of the tyre tymes the radius).
2006-10-20 06:28:40 · answer #6 · answered by David william 1 · 0⤊ 0⤋
Smaller tires - easier to turn (less fritction) and easier to see over and around.
Large tires - larger contact patch for better traction, such as when pulling a plow or doing other work.
2006-10-20 07:26:10 · answer #7 · answered by id4rob 1 · 0⤊ 0⤋
Mostly that would be a steering issue. But i have a 4wd with all 8 tires the same...it steers by articulating.
2006-10-20 13:55:44 · answer #8 · answered by ? 6 · 0⤊ 0⤋