Free Setup Tools

Dirt racing suspension tools — built for the shop, free to use. No account required, no data leaves your browser.

4-link calculator showing anti-squat, roll center, and a 3D view of the rear links

Triangulated 4-Link Calculator

Full 3D kinematic solver for triangulated 4-link rear suspensions. Enter your link measurements and instantly see anti-squat, roll center, rear steer, and roll articulation — with interactive 3D, side, rear, and top views.

Suspension builder replaying a lap with a 3D front end and camber and toe charts

Double-Wishbone Suspension Simulator

Constrained-kinematics solver for SLA front suspensions. Independent left/right geometry, hardpoint editor, per-corner travel control, Ackermann, roll center migration, and bump steer.