![]() Roll Steer - When one side of the axle is further forward or back than the other side when there is body roll.Anti-Dive (Front suspension) - The effect on how the suspension behaves when braking forces are applied.Anti-Squat (Rear suspension) - The effect on how the suspension behaves when inertia or torque is induced during acceleration.Front/Rear Specific - The hypothetical line between the instant center and the roll center (This is important when eliminating roll steer).Vehicle Roll Axis Angle - The hypothetical line between the front roll center and the rear roll center.Measured in degrees (There are multiple forms of Roll Axis Angles to consider when designing suspension.) ![]() Roll Axis Angle/Inclination - The axis at which the sprung mass rotates in relation to the unsprung mass when lateral forces are applied.(i.e Draw a line along the upper and lower links until the lines converge. Measured in height from ground, and distance from axle centerline. Instant Center - The convergence point at which suspension components hypothetically meet.Measured in height in relation to the ground (You will see/hear this term a lot) Roll Center - The point at which the sprung mass rolls in relation to the unsprung mass when lateral forces are applied.(Play with the calculators to visually see how changes effect each of these factors). Some things you should know before tackling this on your own. Not everything will be perfect due to packaging constraints. Remember, there will be a lot of compromising on suspension design. Feel free to correct anything I may have said that may be incorrect.įirst, if you want to design your own suspension, you should understand the basics of suspension geometry, and the key words that you need to know when trying to come up with the best overall design for your needs. I'm going to try to explain some things to look for when building your own 3-link or 4-link, and using the calculators. To download the Triaged 3-Link and 4-Link calculators, click the link and scroll to the bottom right of the page for the excel spreadsheet based calculators.
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