Answer Posted / mahesh lakhani

Tractor means (traction + motor)so in case of tractor the
requirement of torque is much higher then the other
vehical, as the application where the vehical uses farm,
off-road application dozer and loder, so it needs high
torque in driver wheel to prevent the machine to get slipe.

in tractor there are few speed reduction stages like
transmission, differentail, and final reduction (with bull
gear or planetory) thru bigger tyre can increse the contact
area with soil, which help to increse torque as the torque
(T= r(is the displacement)* f(is the force vector)

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