Diesel engines have high torque but low rpm operating ranges, and carry heavy loads.
The range of gears allows the truck to get moving with a load and bring it up to speed utilizing the best operating conditions of the engine.
That way a reasonable engine size can be used, to operate like a passenger car the engine would have to be the size of the entire cab of the truck, and would use an outrageous amount of fuel.
Yes it does.
How much weight it can tow or carry and how much you need it too. How many gears it has and how easy it is to steer and shift.
Yes
Tracker Trucks can be purchased in many places. Teletrac, Tracker Trucks, The Longboard Store, So Cal Skate Shop, and many other boarding supply shops sell tracker trucks.
it has 6 gears
12 forward gears and 4 backward gears
6 gears and neutral.
5 gears
6 gears
it has 6 gears
there are 5 gears
6 gears