The front wheel(s) are only for steering and holding the front end up. The back wheels supply the power and must have traction. Making them big lets them carry big tires which keeps the tractor from getting stuck in muddy fields and keeps them from slipping so easily. The big lugs on the tires also help in that regard.
A "mechanical front wheel drive" tractor has front-wheel-assist which means that not only the rear drive wheels pull the tractor ahead, but the front wheels also pull the tractor.
It is more difficult to steer with big tires, they are smaller so they are managable, also the weight on a tractor and traction is needed in the rear
A Penny Farthing
When you turn the front wheels, they skid sideways as they turn. The skidding wears rubber off the tire.
It is huge/big because of traction purposes. Larger the wheel, larger the amount of traction it has on the ground!!
its to do with gearing think about having small wheels on the back they.d never push the big wheels
The size of the rear tires on the Cub Cadet 1641 garden tractor are 23x10.5-12. The size of the front tires are 16x6.5-8. The wheel base on this tractor is 46.5 inches.
front wheel they can be change to rear wheel theu can be changed but mostly front wheel drive
A huge front wheel, with pedals at the hub, trailed by a much smaller rear wheel. The rider sat almost on top of the huge front wheel.
70/30 % front/rear
rear wheel drive
Rear wheel