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Scrub radius, aka kingpin offset, can be tricky to understand, but it's well worth it to ensure you make the right wheel and tyre courses and avoid some fundamental mistakes that can turn a stable and predictable handling car into something twitchy and uncontrollable.

In this free lesson taken from the HPA Wheel and Tyre Fitment course, we're going to dive deeper into what scrub radius is, how it affects your handling, and other critical aspects that directly relate to what they are. That includes caster and kingpin inclination, aka kingpin angle.

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TIME STAMPS:
0:00 - Critical Knowledge
0:30 - What Is Caster
1:07 - Positive Caster
1:34 - Kingpin Inclination/Kingpin Angle
2:17 - Scrub Radius/Kingpin Offset
3:12 - Wheel Offset Relationship
3:25 - Steering Travel Arc
4:03 - Too Much Caster Or Scrub Radius?
4:28 - Suspension Tuning & Optimisation
4:38 - Sensitive Steering
5:15 - 40mm Scrub Radius Goals
5:24 - Clearance Considerations
5:43 - Lesson Summary
6:26 - Wheel Fitment Course
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TAGS:
#highperformanceacademy #buildtunedrive #learndriveoptimise #scrubradius #suspension #datanerd #racecraft #cars #motorsport #racing #boost