Vehicles have two, four or more wheels and these can be connected to the engine or driven by momentum. Some vehicles designed for use on rough terrains have all four wheels connected to the engine for better control and more power. These vehicles are having a 4 X 4 drive train and are often called 4X4 vehicles. Most of these vehicles are sports utility vehicles and they are designed for off-road user. Many car owners and drivers would like to find out how do 4x4 wheels improve performance, what the are the benefits of using these wheels compared to the other designs available.
Drivers and vehicle owners should be aware that many of the inexpensive cars available have only two wheels connected to the engine, the other two wheels are driven by momentum. These cars are cheaper to manufacture and also consume less power. However, they are not suitable for rough terrain, off-road condition, since two wheels are not driven by the engine. If a vehicle is being used on rough terrain, hills, mountains, uneven surfaces, it is necessary to have a drive train which will power all the wheels for better control and safety. Hence the vehicle should have 4 X 4 drive-train, will all wheels connected to the engine axle.
Though 4X4 vehicles are more expensive to manufacture, and also consume more power, they are safer to use on rough, muddy or slippery terrain since all the wheels are controlled. Since the vehicle owner will often use the vehicle on smooth roads for most of the time, in some vehicles there is provision for changing the vehicle to a 4 X 4 by pushing a button. This will help to reduce the power consumption to some extent. It is important to choose the right size of wheels for the vehicles. Though larger wheels can improve the performance to some extent, they consume more fuel. Smaller wheels are more comfortable and consume less power.