Squatline

Rear suspension kinematics

Layout

Layers

Cog

Ring

12345678

ABCD

Track

SAG

Each wheel rolls over the ground and both ends take up the difference from sag while the frame holds its line. No springs, damping or rider are modelled: past full travel the frame lifts, and in a dip deeper than the suspension can extend, the wheel leaves the ground. The fork uses the travel and sag set under Geometry. Anti-squat and anti-rise lines hide while riding, as they're measured from flat ground.

Through the travel

Save or load a design

A design is plain JSON: every point, body, the shock, wheels and drivetrain. Copy it somewhere safe, or paste one in and load it.

Open file…

Export

SVG keeps lines and text editable in Illustrator, Figma or Inkscape. CSV files open in any spreadsheet. Pictures use the current light or dark theme. Each chart also has its own save menu.

The six charts on one sheet, each with its title, units and legend.

The same sheet as a picture, for slides and messages.

Every value through the travel, one row per step: leverage, anti-squat, chain growth and kickback in each cog, anti-rise, axle path, wheel force, instant centre.

The geometry chart, static and at sag, with the shock, fork, wheels and drivetrain it assumes.

The side view as it is on screen, at the current point in the travel.

Hover to read every series at once. Click the chart to move the drawing to that point in the travel.

Size