Free suspension tools

Calculators and lessons for FSAE and Formula Student teams, and anyone learning how a suspension works. They run in your browser, with nothing to install and no account.

• Roll center calculator

  Type your front-view hardpoints or drag them. See the roll center height, instant center and swing arm, and how they move in bump.

• Spring rate calculator

  The spring a target ride frequency needs, with the motion ratio and the tire included. Or the ride frequency of a spring you have.

• Weight transfer calculator

  Each corner's load standing still, braking, accelerating and cornering, from the mass, CG height, wheelbase and track.

• Car setup lessons

  Two interactive lessons: what an anti-roll bar does to balance, and what lowering does to the roll center.

• Suspension cheat sheet

  Every formula from the Contact Patch videos on one page, plus a spreadsheet that does the math. Free by email.

• Vehicle Dynamics Workbench demo

  Try the full 3D workbench on an example FSAE car: kinematics, loads, rules and what moves each target.