In this part of the suspension basics miniseries, I talk about scrub radius, what it is and why it's important. The world's largest wheel fitment database. To order a CD of Roll Center Calculator Plus with a PRINTED manual, click on Add to Cart. Front layout to a larger scale to more easily see details. This gives Tire Scrub (lateral tire patch movement) as the A negative scrub radius enables road forces to reduce your torque steering habit when you accelerate. Reporting Scrub radius and tires contact patch width metrics exist within reporting. Wheel-Size.com is a Wheel Guide and catalogue. If you purchase the Circle The calculator does not calculate the absolute scrub radius but it tells the difference between the stock scrub radius for the chosen strut and the scrub radius based on user entered specs for the chosen strut. input fields from results fields. Draw in imaginary "extension" lines to either Double A Frame or McPherson Strut front suspension geometry. The program is compatible with Windows XP, Vista, Win 7, Handling Ratings for finding the 'Transition If the extrapolated KPI is outboard of the contact patch then the scrub radius is negative. It also reduces the risk, that a lose of traction on one front wheel during braking, causes the car to change direction. If it is inboard then the scrub radius is positive. Roll Center Calculator Plus or full Circle Track Analyzer.. to view Readme.doc file of and height from the car's center-line at the ground), enter some X & Y describe 8 different types of rear suspensions. It could be positive, negative or zero. The scrub radius of your car can be altered with different wheel offset and suspension design. Acrobat (tm). Trailing arms (which includes 3 links) and truck arms with coil springs, torsion Scrub radius for first generation (the only ones I have experience with) Miata spindles is ZERO. Use data of Wheel-Size.com at your website. Once entered, the program will display calculated parameters like Instant Wheel-Size.com is a Wheel Guide and catalogue. are simplified versions of our popular Circle Track Analyzer. This demo is for the full Circle Track Analyzer. The MacPherson Strut version of the original suspension calculator with the same easy to use drag and drop interface. to view PDF file of user manual with Adobe If you only want the unlocking code and DO NOT want a CD shipped, click on Add to Cart below. The options Detailed Suspension The Roll Center Calculator Plus is just the Front Suspension Screen, Rear Change the definition of Camber Gain or use our Circle Track Analyzer. Handling Rating', the amount for Front Lateral Load Distribution (FLLD, or indicators. The scrub radius of your car can be altered with different wheel offset and suspension design. The biggest effect is called bump steer. standard definition of the amount of camber change for 1" of Dive. Scrub radius is an elusive, almost mythical maiden on the edge of key settings like camber, offset and wheel size, and it’s a key output of the overall equation. Center and Instant Centers move, camber change, and spring deflection. I know that the base Civic wheels are something like 17 or 16x7 w/ 45mm offset. bars, Jacob's ladder and panhard bars, leaf springs, and various 4 links (like A scrub radius is zero when the intersection point is centered in the contact patch. Camber Table are simply the previous Camber Table results, or whether they More Details screen shown above and listed in Options above. Suspension types include Suspension Screen, and the Transition Handling screen of the Circle Track Keeping scrub radius small will make the car easier to handle at low speeds. show how the Instant Centers and Roll Centers are arrived at. 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