Scrub Radius - Suspension Design - Explained

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Engineering Explained





Published on Nov 25, 2015


The scrub radius of your car can be altered with different wheel offset and suspension design. This will affect how the tire contact patch interacts with the road during cornering, braking, and acceleration, and can cause unique toe characteristics depending on the design. A positive scrub radius tends to be beneficial while braking into a turn. A negative scrub radius tends to better for braking stability in the event of brake failure or split-mu braking. Typically the scrub radius is configured to be as small as possible to minimize the effects under braking, but squirm (from zero scrub radius) is also undesirable.