Computer Program to Simulate and Analyze Front Suspension (Double a Arm or McPherson Strut) for Camber Gain, Roll Center, Wheel Rate and More. Overview: The Roll Center Calculator lets you input, view, save, analyze and compare either Double a Frame or McPherson Strut front suspension geometry. The options for entering your geometry specs include: enter X & Y coordinates (distance and height from the car's center-line at the ground), enter some X & Y coordinates and angles & lengths of arms, or retrieving one of the examples which comes with the program. Once entered, the program will display calculated parameters like Instant Centers, Roll Center, King Pin Angle, Wheel Rate, Scrub Radius, and Camber Gain (the amount Camber will change for a certain amount of Dive and/or Roll). Then click on Yes for Show Dive & Roll and adjust Dive and/or Roll and watch Roll Center and Instant Centers move, camber change, and spring deflection. Spring deflection is useful to reproduce track conditions shown by your shock indicators. Options: The program has several options, including: McPherson Strut suspension analysis. Shimming option for double a Arm suspensions. Draw Big' option to draw and print the layout to a larger scale to more easily see details. Draw in imaginary "extension" lines to show how the Instant Centers and Roll Centers are arrived at. All dimensions, angles, lengths and Camber (if requested) are updated as you adjust other dimension (handy for McPherson Strut camber adjustments. )Change the definition of Camber Gain or use our standard definition of the amount of camber change for 1" of Dive. Adjusting the starting point, ending point, number of points, and whether Dive or Roll will be displayed in Rows or Columns. Selecting whether the Baseline conditions in the Camber Table are simply the previous Camber Table results, or whether they are some specific condition you have saved. The program is compatible with Windows 95, 98, Me, XP, 2000 or NT, which means it is easy to use and you will be able to print the results on most any printer, usually in color if your printer supports it. What You Need: IBM or compatible computer with Windows 95, 98, Me, XP, 2000 or NT. What You Get: Program CD, 40 page manual, some example suspensions preloaded.Pit Stop USA offers Performance Trends Roll Center Calculator Version 3.6 for Windows RC36C at low everyday prices. Be sure to check out all of our products from Performance Trends including Performance Trends Roll Center Calculator.