From where to where..

The only significant parts that use the vehicle's on site contact is tires. It's made of a combination rubber, steel wires and chemical supplies. It allows the load and the vehicle to be transported through the air that is pushed into the tire.
The working principle of tires can be described as simply defeating the frictional force by means of a rotary motion with an axle. In order to be able to make a turning motion on a surface, tires are absolutely necessary to be exposed to gravitational force or another external force.

Do not take serious that this was done before. Never give up to enhance.

The back zone of tire is the part of contact to road. When the tire became age, traction is reduced. Over time, the pattern on tire wears out and becomes unusable. Tread depth is very important for this reason (reference , available online: 11.01.2017)

On the other hand, over the world, over 15 million tonnes of rubber are produced annually; About one of three which is natural rubber. And two out of three is artificial (synthetic) rubber. Rubber is actually a tree name. The material obtained from this tree ( it's name is latex and it's natural rubber) has been used in the industry. Because of the use of natural rubber a lot, the synthetic rubber was obtained by the Germans in 1906 so as to procure the rubber at a very cheap and abundant quantity.

Where is it used?

The use of rubber has increased dramatically with the development of highway transport.  Rubber was first used in bicycle wheels. Then, it was used in the wheels of trucks,planes,tractors and similar vehicles. Apart from these, rubber are used in many different sectors such as waterproof clothing, toys, upholstery materials,blow-up beds etc.

Why is it so much preferred?

The most important feature of rubber is that it has a high elasticity. It is dissolved in rubber naphtha, carbondissulfide, carbontetrachloride, turpentine, ether, gas oil, petrol and similar dissolving liquids. The rubber has properties such as softness, durability, elasticity, water and air impermeability, adhesion and resistance to electricity. Among the physical products, rubber is a very important product because of these properties (reference, available online: 11.01.2017).

Ok. That's enough information :) Now I should show you the tire of tractor which I have drawn at Solidworks.

There was a line before everything :D

     and the mirror command...

then I used revolve command to get bodies of tire

I must open a newplane on the bodies of tire. It's too important for treads.

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then i created curves via spline command..

Using  extruded, extruded cut,circular pattern, chamfer and fillet commands..

I made a very vibrant tire of tractor ^.^

If you want to follow my commands, I have uploaded my solidworks part in this link.

C ya.