Chassis
Doctor
Independent Front Suspension — Geometry Calculator
MM
IN
SAVE
LOAD
⚙ SETUP
▶ SIMULATE
Position all pivot points, then switch to Simulate
SETUP — Drag any ✛ handle to adjust · Outboard handles move freely within wheel
Roll Centre Height
—
lateral: —
IC Left — Height
—
lateral: —
IC Right — Height
—
lateral: —
KPI
—
kingpin inclination
Scrub Radius
—
at ground
Camber Left
0.00°
Bump / Droop
0 mm
Roll
0.0°
Camber Right
0.00°
Bump/Droop
0 mm
Roll
0.0°
TRACE: OFF
CLEAR
RESET
Tyre & Track
Track width — hub to hub
mm
Tyre rolling radius
mm
Tyre section width
mm
Upper Wishbone — Inboard
Height above ground
mm
Distance from centreline
mm
Lower Wishbone — Inboard
Height above ground
mm
Distance from centreline
mm
Outboard Ball Joints — on Upright
Drag the ✛ handles on the upright directly in the diagram. These move freely within the wheel to set scrub radius & kingpin geometry.
Upper BJ — distance from centreline
mm
Upper BJ — height above ground
mm
Lower BJ — distance from centreline
mm
Lower BJ — height above ground
mm
Camber
Static camber (negative = top inward)
°
Instantaneous Centres
Left IC height
—
Left IC lateral
—
Right IC height
—
Right IC lateral
—
FVSA / Swing Arm
Left FVSA length
—
Right FVSA length
—
Upper Wishbone
Arm length
—
Inclination
—
Lower Wishbone
Arm length
—
Inclination
—
Upright / Hub
Upright length
—
KPI angle
—
Scrub radius
—
Hub offset (ET)
—
Upper:Lower ratio
—
Camber gain/25mm
—
Bump
0 mm
Roll
0.0°
// Notes
Adjust geometry then simulate.
KEY
Upper wishbone
Lower wishbone
Upright
Extended → IC
Instantaneous Centre
FVSA line
Roll Centre
Contact patch