![]() ![]() The shocks and springs on a car are important because they will help it maintain the desired ride height of the chassis and make sure everything is working correctly in the suspension for the track conditions. By establishing the correct ride height, things like driveline angle and height, along with the rear suspension mounting points, can be mapped out. These basic measurements are how you set the baseline for chassis ride height if you don’t base it on the wheels and tires being used, the ride height equation will never be correct. ![]() For the front, you would measure from the center of the mounting point of the tire, like the spindle, while in the rear you’d use the axle as your center measuring point. When the wheels and tires have been chosen and diameter established, the radius of that tire diameter can be used to find the distance needed from the ground for chassis ride height. Here’s an example of a wheel and tire being used to set the chassis ride height as fabrication begins. The factor that trumps all of those, however, is the wheel and tire choice, which will dictate exactly where your chassis ride height will or should be. There are many different variables that will factor into this, including whether or not the car is a tube chassis build, a back-half conversion, the type of suspension the car has, and the driveline. Generally speaking, chassis ride height is the height the car as it sits after you have the suspension at its best possible location. Having a plan of what you want to do with the car up front is paramount in making sure it will work for your intended use, and keep the “new car blues” time period much shorter when you’re at the track. The chassis ride height is something that’s set at conception when the car is being constructed, and rarely can ever be changed without cutting the car apart. Having the accurate chassis ride height on a racecar for its intended use is critical, as it ensures the car will work correctly and respond to changes based on track conditions. ![]() Getting a high horsepower car to hook at the track takes a solid understanding of suspension, and how ride height plays into it. ![]()
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