Front suspensions
Most cars today come with independent front suspensions, meaning they have two arms to hold up each wheel. The knuckles are designed to allow wheels to spin freely, which increases control and stability at high speeds or in emergency maneuvers. A strut-style suspension, common on SUVs and trucks, has a large coil spring that supports about 50 percent of a vehicle’s weight. Coil springs also help cushion passengers when braking or making quick turns. Four-wheel independent suspensions are more expensive than other types but provide better handling and ride quality. They’re ideal for drivers who want their vehicles to feel like sports cars without paying sports car prices.
Rear suspensions
The rear suspension is a simple beam axle with a leaf spring. It’s light and inexpensive, but it doesn’t handle bumps or potholes well, so it doesn’t handle off-road driving very well either. The standard choice for most cars and pickups, though, since there are few other choices available. Most manufacturers include some form of anti-roll bar to improve handling. You can also find independent rear suspensions (IRS) on some models, which allow each wheel to move independently. These tend to be more expensive than a traditional beam axle system and don’t provide much benefit in performance over time, so they aren’t as common as they once were.
Spring suspensions
For everyday driving, there’s nothing better than a quality spring suspension. Like many vehicle parts, suspensions have multiple names depending on where you live or what language you speak. The most common are springs (in America), suspension systems (UK), and shock absorbers (the rest of the world). Spring suspensions help vehicles go over bumps in roads more smoothly and ride more comfortably. To learn more about how they work, read How Springs Work. In short, it’s all about energy transfer -- specifically energy stored within compressed springs. When you press down on a spring, it transfers its potential energy to your body; when you let go of that same spring, it will transfer its kinetic energy back to your body in reverse -- sending your body upward into the air at an ever-increasing rate. With cars and trucks, we can control that speed with our brakes, but that wouldn't be much fun!
Shock absorbers
If you’re looking to improve your vehicle’s comfort and performance, consider upgrading your shock absorbers. Shock absorbers control suspension travel by absorbing bumps and vibrations. They are divided into three categories.: gas-charged shocks, nitrogen-charged shocks, and air shocks. Each of these types is designed for a specific purpose. For example, nitrogen-charged shock absorbers are used on cars that go off-road more often than others. Air shocks provide better handling characteristics but have a tendency to bottom out when pushed too hard. Most vehicles come with gas-charged shock absorbers as standard equipment, but if you plan on doing some hardcore driving or racing, it might be worth considering an upgrade.
Coil springs
These springs use individual coil pieces to handle the impact. While they can provide good shocks, they aren’t quite as reliable as some of the other models on our list. You can’t expect a whole lot of swaying with these springs, but you do get a smooth ride and reliable dampening. Coils are cheap and easy to find so you can replace them if necessary. They also don’t take up much space, which is great for smaller cars. If you have a sports car or something similar that needs better handling and shock absorption, these are a great option. They don’t work well in bigger vehicles like SUVs or vans because they don’t offer enough support to those types of vehicles.
Suggestion
If you’re looking to buy a new suspension, there are many different options to choose from. Most vehicles come with a stock setup; however, upgrading can provide better performance and handling. If you want improved control and more stability, consider replacing your stock components with a coil-over system. Coilovers eliminate your vehicle’s factory struts, allowing you to easily fine-tune ride height by adjusting how much (or little) of your car’s weight rests on each individual wheel.
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