whats a rear spoiler.. do u really need it...?

Answer 1

A rear spoiler creates downward force on your car to help it "stick" to the road better. It is like an upside down wing.

Do you need it?

If you travel in excess of 110 mph on a constant basis, then yes, it is a good thing.

If you pretty much stay under 100 mph, then a spoiler does absolutely nothing.

Answer 2

Spoilers generally work by disrupting the airflow going over a car. This disruption has the primary purpose of reducing the amount of lift naturally generated by the shape of the car.

The result is increasing the contact between the tire and the road surface, thereby increasing traction. This increase in traction allows a vehicle in motion to brake, turn, and accelerate with more stability. Additionally, this is accompanied by an increase in aerodynamic drag.


In nearly all cases, drag increases as the speed of the vehicle increases. Thus, some spoilers that are effective at very low speeds often generate excessive drag at high speeds, and spoilers that work well at high speeds are often ineffective while moving slowly.

so basicly the ones on street legal cars are for show

Answer 3

A rear spoiler is a way of beautifying the back of a car and ofcourse it comes in different designs and shapes. Some comes with white or red light. The light also indicate stop whenever brake is apply. However, it helps keep away people who love to seat on top of your car trunk. There is no way you will seat on a spoiler. It is not expensive. If you feel like add a little design to your car then get one for yourself.

Answer 4

Spoiler uses wind to force weight down on your car which may provide better traction and control at speed. Not as effective on a front-wheel drive car and hardly worth it at 60mph. Most of the time its just eye-candy.

Answer 5

Theoretically, it improves handling by providing more stability by pushing the back of the vehicle downwards. In real life, with 55-60-75 MPH speed limits it has no practical purpose other than making a dealer who sells it for $1,000 rich.

Answer 6

He doesn't know what he's talking about. If it's hardly worth it at 60mph, why do you see them on every car in GT class racing?
They do make difference, but you don't necessarily need one, unless you're going to race. As far as what they are, take a look at the back end of a GT racecar. It looks a little bit like an airplane wing. The force of the wind pushes on it to keep the tail end of the car on the road, thus enhancing it's performance and handling.

Answer 7

Car makers typically add (what's commonly referred to as) a spoiler for two main reasons:
1 it changes the aerodynamics of a car
2 it makes the car look better if done right

Answer 8

You'll probably never drive fast enough for it to serve it's purpose, which others have explained.

Answer 9

to make your tail wag high up the air to attract attention sweety.