The long used 4 Link Calculator. Though it may have changed a bit.
Features in the newest version include:
How's My Number's thread: How's my numbers?
Linked Suspension Bible: December's Bible Build: Linked Suspensions
Features in the newest version include:
- Analysis of 4 link, and limited analysis of 3 link with panhard, 4 link with panhard
- Front, rear, and vehicle analysis
- Imperial and metric unit systems
- Anti-squat, anti-dive, anti-lift calculations
- Roll center and roll slope calculations
- Pinion angle change
- Side to side movement predictions, where applicable
- Link sizing and material selection
- Driveshaft lengths and joint angles
- Support for coilover and coilover+bypass setups
- Support for axle and link mounted shocks
- Shock install ratio calculations
- Coilover spring rate estimation
- Wheel rate and vertical force predictions
- Analysis of vehicle at various points of front and rear suspension movement
- Vehicle pitch under climb (and descent), acceleration and deceleration predictions
- And more
How's My Number's thread: How's my numbers?
Linked Suspension Bible: December's Bible Build: Linked Suspensions