Suspension Designer
Four-bar flex-stay suspension kinematics: leverage ratio, anti-squat/rise and stay stress. Drag pivots; validated against Linkage X3.
◀ all toolsPivots and mounts
Datum:
Shock
Tubes
Cockpit
Wheels
Fork
As drawn
Idler
build 2.0
Travel and rate
Balance
Gap from each pivot body to the nearest tube wall, so a boss does not end up inside a tube. The main pivot's two offsets and the down tube to seat tube angle are what its printed housing is made to, and change with every frame size.
Static, in plane, from the rear wheel load alone. No braking or cornering case yet.
Steel tubing, constant section, load shared by two stays. Out of plane bending from the lean does not cancel against the flex, so the two are combined as a resultant moment.