Stop Ignoring Scrub Radius.
28K views · Sep 9, 2024 · Autos & Vehicles
Comments · 49
@hpa101 · 2 years ago · pinned
🏎 Building a fast car? Get $400 OFF the all-inclusive VIP online course package deal: <a href="https://hpcdmy.co/ezi">https://hpcdmy.co/ezi</a><br>🛞 Take 50% off your first purchase: The Wheel and Tyre Fitment online course. Instant enrolment, lifetime access: <a href="https://hpcdmy.co/kfv">https://hpcdmy.co/kfv</a><br>TIME STAMPS:<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk">0:00</a> - Critical Knowledge<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=30">0:30</a> - What Is Caster<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=67">1:07</a> - Positive Caster<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=94">1:34</a> - Kingpin Inclination/Kingpin Angle<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=137">2:17</a> - Scrub Radius/Kingpin Offset<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=192">3:12</a> - Wheel Offset Relationship<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=205">3:25</a> - Steering Travel Arc<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=243">4:03</a> - Too Much Caster Or Scrub Radius?<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=268">4:28</a> - Suspension Tuning & Optimisation<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=278">4:38</a> - Sensitive Steering<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=315">5:15</a> - 40mm Scrub Radius Goals<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=324">5:24</a> - Clearance Considerations<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=343">5:43</a> - Lesson Summary<br><a href="https://www.youtube.com/watch?v=YAz0ZcsNGkk&t=386">6:26</a> - Wheel Fitment Course
4
@chaoslord8918 · 1 year ago
The two words that pop into my head whenever I see someone with wheel spacers on their car...<br><br>"Scrub radius".
11
@Xanthro2 · 2 months ago
I already understand the formulaic correlational impact of bad ("racers") in relation to (personal proximity) :D
@jakeparker8254 · 2 years ago
Caster offset is anotherr critical one people miss, when your driven wheels are steered to this can cause problems also! Look at wrc McPherson setups for a good example!
4
@onedayiwillmakesomecontent · 2 years ago
I put a 50mm lift, hd spring and shocks in my 2017 Pajero. Couldn't work out why it now Uturns like a fucking boss! This explains it. My missus oversteered it all the time on uturns, scrubbed the shoulder off the left front (australian roads) must be into positive scrub radius, and definitely feels a bit darty on steering!
4
@MRworldEtIkA · 2 years ago
the background took me back to the good old days of Science Garage of Donut Media
18
@1jzfc999 · 2 years ago
I really enjoy suspension and geometry stuff. But i also really like my low offset vskfs with good fitment 😂
19
@apollonitro4802 · 2 years ago
Straight facts
@shadow-r3852 · 2 years ago
one comment to boost engagement and two more words as an upgrade
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@Toronto1545 · 1 year ago
Hello, I’ve got a question regarding camber and caster<br><br>Camber is adjusted so that the outside (heavier) wheel during a turn has a higher contact patch and therefore traction. If the car rolls 1 degree for example, both wheels are 1 degree off. If we add 1 degree of camber, the heavier wheel is perfect and the lighter wheel is twice as bad. Why is the lighter wheel being twice as bad better than both wheels being half as bad? <br><br>Caster is the angle of the spring assembly. Increasing the angle reduces dynamic camber during a turn. With camber, using the example above you get a perfect wheel and a wheel 2 degrees off. With caster, you could get a perfect wheel and a wheel, say, 0.5 degrees off. Why would you ever change camber when you can change caster and get better overall angles?<br><br>Thank you
@arrindaley3714 · 2 years ago
After fitting an ATB to my mini I was surprised at how sensitive to scrub radius / wheel offset the torque steer was. This is the first time I've heard a target for scrub radius, is this target effected by wheel / tyre radius or potentially width?
1
@AudiovisionAVL · 9 months ago
Would you say 5-10mm difference or positive scrub would create a noticeable difference on steering or braking? Or put extra strain on the suspension?
1
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