## What is a good spring rate for lowering springs?

Springs should typically be compressed 25-30% of the free length when supporting the weight of the vehicle. Drag race cars will normally use a lighter rate spring (about 30%) to promote weight transfer while a street car will use a firmer rate spring (about 25%).

## What is the spring rate on a coil spring?

So, what is spring rate? It’s the amount of force that’s required to compress or extend a spring (coil in this case) by 1 inch, and is measured in pounds per inch (lb/in).

**How do I choose a spring rate?**

When attempting to determine the correct spring rate for a car, the trick is to set the ride height so the chassis rests in the shocks’ sweet spot within this small 3- to 4-inch window. A solid-axle rear suspension, on the other hand, is a bit more forgiving.

**What is 8K spring rate?**

What does it mean when they say 8K or 500lb Spring Rate? When someone says “8K” they are shortening the metric measurement of the spring rate; in this case 8 kg/mm. What this means is that if you apply 8 kilograms of weight to the top of the spring it will compress 1mm.

### What does 5K spring rate mean?

So if a spring is listed at 5k it would mean it takes 5 kilograms of force to compress the spring 1 millimeter. If your spring rate is 450lb/in (pounds per inch) it will mean it takes 450 pounds of force to compress the spring 1 inch.

### What do higher spring rates do?

Although a higher spring rate reduces body roll, it comes at the expense of a harsher ride. “Not only will a softer spring improve ride quality, it will also enable the tires to follow uneven road surfaces more precisely for improved grip.

**What does the K mean in coilovers?**

Most commonly seen is a spring rate given in KG/mm or LBS/in. This means the weighted force / the space traveled. For example, 700LB/in would mean 700 pounds will compress that spring 1”. This can also be read as 12.5K/mm (12.5kg to compress spring 25mm).

**How to figure out coilover spring rates?**

Wire Diameter: This effects rate since a greater wire diameter is stronger than a smaller diameter wire.

#### What is the best spring rate for coilovers?

The greater the angle of the spring, the stiffer it will need to be to support the weight of the car. A coilover with a 10” 225 lb. spring that is installed at 0° straight up and down (90° from the axle centerline) will support 1450 lbs.

#### How do I calculate coil spring rates?

– Wire diameter is the thickness of the coil metal which is most accurately measured with vernier callipers – Mean diameter is shown in the diagram and is the distance between centres of the coil spring. – The number of active coils still has uncertainty in the industry of how to apply an accurate number for a type of spring.

**Which coilover is best?**

Spring Rates. Understanding what spring rates are is pretty simple.