Metric reference

Generated from core 0.8.1. Download the complete manifest.

The complete built-in catalog contains 77 metric identities. Availability follows the installed architecture and mechanisms. A declared metric can return an empty value when geometry is undefined or required physical inputs are missing. Custom user-defined derivatives are outside this finite catalog.

Corner identities receive _left and _right suffixes in axle exports. Axle identities are already complete: a derivative ending in hub_z_left, for example, names its driver and does not receive another side suffix. See Export columns for other CSV/Parquet fields.

DWB = Double wishbone; MPS = MacPherson strut; ML = Multi-link (five-link); STA = Semi-trailing arm. An asterisk (*) marks conditional availability.

State metrics

Identity	Label	Unit	Scope	Architectures
ackermann_percentage	Ackermann	%	Axle	DWB, MPS, ML, STA
anti_dive	Anti-Dive	%	Corner	DWB, MPS, ML, STA
anti_lift	Anti-Lift	%	Corner	DWB, MPS, ML, STA
anti_squat	Anti-Squat	%	Corner	DWB, MPS, ML, STA
arb_arm_angle	ARB Arm Angle	deg	Corner	DWB*, ML*
arb_end_displacement	ARB End Displacement	mm	Corner	DWB*, ML*
arb_twist	ARB Twist	deg	Axle	DWB*, ML*
braking_anti_angle	Braking Anti Angle	deg	Corner	DWB, MPS, ML, STA
braking_anti_ratio	Braking Anti Ratio	1	Corner	DWB, MPS, ML, STA
camber	Camber	deg	Corner	DWB, MPS, ML, STA
caster	Caster	deg	Corner	DWB, MPS, STA
caster_virtual	Caster, Virtual	deg	Corner	DWB*, MPS*, ML*
contact_patch_lateral_migration	Contact-Patch Lateral Migration	mm	Corner	DWB, MPS, ML, STA
damper_length	Damper Length	mm	Corner	DWB, MPS, ML, STA
fvic_y	FVIC Y	mm	Corner	DWB, MPS, ML, STA
fvic_z	FVIC Z	mm	Corner	DWB, MPS, ML, STA
fvsa_length	FVSA Length	mm	Corner	DWB, MPS, ML, STA
half_track	Half-Track	mm	Corner	DWB, MPS, ML, STA
heave	Heave	mm	Axle	DWB, MPS, ML, STA
heave_link_length	Heave Link Length	mm	Axle	DWB*, ML*
kpi	KPI	deg	Corner	DWB, MPS, STA
kpi_virtual	KPI, Virtual	deg	Corner	DWB*, MPS*, ML*
mechanical_trail	Mechanical Trail	mm	Corner	DWB, MPS, STA
mechanical_trail_virtual	Mechanical Trail, Virtual	mm	Corner	DWB*, MPS*, ML*
rack_displacement	Rack Displacement	mm	Axle	DWB, MPS, ML, STA
ride_height_change	Ride Height Change	mm	Axle	DWB, MPS, ML, STA
rocker_angle	Rocker Angle	deg	Corner	DWB*, ML*
roll	Roll	deg	Axle	DWB, MPS, ML, STA
roll_center_y	Roll Center Y	mm	Axle	DWB, MPS, ML, STA
roll_center_z	Roll Center Z	mm	Axle	DWB, MPS, ML, STA
scrub_radius	Scrub Radius	mm	Corner	DWB, MPS, STA
scrub_radius_virtual	Scrub Radius, Virtual	mm	Corner	DWB*, MPS*, ML*
spring_length	Spring Length	mm	Corner	DWB, MPS, ML, STA
steer_angle	Steer Angle	deg	Corner	DWB, MPS, ML, STA
steering_axis_lateral_offset_wheel_center	Steering-Axis Lateral Offset at Wheel Center	mm	Corner	DWB, MPS, STA
steering_axis_lateral_offset_wheel_center_virtual	Steering-Axis Lateral Offset at Wheel Center, Virtual	mm	Corner	DWB*, MPS*, ML*
steering_axis_longitudinal_offset_wheel_center	Steering-Axis Longitudinal Offset at Wheel Center	mm	Corner	DWB, MPS, STA
steering_axis_longitudinal_offset_wheel_center_virtual	Steering-Axis Longitudinal Offset at Wheel Center, Virtual	mm	Corner	DWB*, MPS*, ML*
steering_axis_offset_ground	Steering-Axis Offset at Ground	mm	Corner	DWB, MPS, STA
steering_axis_offset_ground_virtual	Steering-Axis Offset at Ground, Virtual	mm	Corner	DWB*, MPS*, ML*
svic_x	SVIC X	mm	Corner	DWB, MPS, ML, STA
svic_z	SVIC Z	mm	Corner	DWB, MPS, ML, STA
svsa_angle	SVSA Angle	deg	Corner	DWB, MPS, ML, STA
svsa_length	SVSA Length	mm	Corner	DWB, MPS, ML, STA
t_bar_heave_angle	T-Bar Heave Angle	deg	Axle	DWB*, ML*
toe_angle	Toe Angle	deg	Corner	DWB, MPS, ML, STA
torsion_bar_twist	Torsion Bar Twist	deg	Corner	DWB*, ML*, STA*
track	Track	mm	Axle	DWB, MPS, ML, STA
track_change	Track Change	mm	Axle	DWB, MPS, ML, STA
traction_anti_angle	Traction Anti Angle	deg	Corner	DWB, MPS, ML, STA
traction_anti_ratio	Traction Anti Ratio	1	Corner	DWB, MPS, ML, STA
wheel_center_recession	Wheel Center Recession	mm	Corner	DWB, MPS, ML, STA
wheel_travel	Wheel Travel	mm	Corner	DWB, MPS, ML, STA

Motion ratios & response derivatives

Identity	Label	Unit	Scope	Architectures
deriv_arb_end_displacement_wrt_hub_z_left	ARB End Displacement wrt. Left Hub Z	mm/mm	Axle	DWB*, ML*
deriv_arb_end_displacement_wrt_hub_z_right	ARB End Displacement wrt. Right Hub Z	mm/mm	Axle	DWB*, ML*
deriv_arb_twist_wrt_hub_z_left	ARB Twist wrt. Left Hub Z	deg/mm	Axle	DWB*, ML*
deriv_arb_twist_wrt_hub_z_right	ARB Twist wrt. Right Hub Z	deg/mm	Axle	DWB*, ML*
deriv_camber_wrt_hub_z	Camber wrt. Hub Z	deg/mm	Corner	DWB, MPS, ML, STA
deriv_camber_wrt_rack_displacement	Camber wrt. Rack Displacement	deg/mm	Corner	DWB*, MPS*, ML*
deriv_caster_wrt_hub_z	Caster wrt. Hub Z	deg/mm	Corner	DWB, MPS, STA
deriv_contact_patch_lateral_migration_wrt_hub_z	Contact-Patch Lateral Migration wrt. Hub Z	mm/mm	Corner	DWB, MPS, ML, STA
deriv_damper_length_wrt_hub_z	Damper Length wrt. Hub Z	mm/mm	Corner	DWB*, MPS, ML*, STA
deriv_half_track_wrt_hub_z	Half-Track wrt. Hub Z	mm/mm	Corner	DWB, MPS, ML, STA
deriv_heave_link_length_wrt_hub_z_left	Heave Link Length wrt. Left Hub Z	mm/mm	Axle	DWB*, ML*
deriv_heave_link_length_wrt_hub_z_right	Heave Link Length wrt. Right Hub Z	mm/mm	Axle	DWB*, ML*
deriv_kpi_wrt_hub_z	KPI wrt. Hub Z	deg/mm	Corner	DWB, MPS, STA
deriv_rocker_angle_wrt_hub_z	Rocker Angle wrt. Hub Z	deg/mm	Corner	DWB*, ML*
deriv_spring_length_wrt_hub_z	Spring Length wrt. Hub Z	mm/mm	Corner	DWB*, MPS, ML*, STA*
deriv_steer_angle_wrt_hub_z	Steer Angle wrt. Hub Z	deg/mm	Corner	DWB, MPS, ML, STA
deriv_steer_angle_wrt_rack_displacement	Steer Angle wrt. Rack Displacement	deg/mm	Corner	DWB*, MPS*, ML*
deriv_t_bar_center_x_wrt_hub_z_left	T-Bar Center X wrt. Left Hub Z	mm/mm	Axle	DWB*, ML*
deriv_t_bar_center_x_wrt_hub_z_right	T-Bar Center X wrt. Right Hub Z	mm/mm	Axle	DWB*, ML*
deriv_toe_angle_wrt_hub_z	Toe Angle wrt. Hub Z	deg/mm	Corner	DWB, MPS, ML, STA
deriv_toe_angle_wrt_rack_displacement	Toe Angle wrt. Rack Displacement	deg/mm	Corner	DWB*, MPS*, ML*
deriv_torsion_bar_twist_wrt_hub_z	Torsion Bar Twist wrt. Hub Z	deg/mm	Corner	DWB*, ML*, STA*
deriv_wheel_center_recession_wrt_hub_z	Wheel Center Recession wrt. Hub Z	mm/mm	Corner	DWB, MPS, ML, STA
deriv_wheel_center_x_wrt_hub_z	Wheel Center X wrt. Hub Z	mm/mm	Corner	DWB, MPS, ML, STA

Configuration availability

An asterisk (*) means that some valid configurations omit this metric. The downloaded manifest records exact membership: select a row from configurations, then resolve its metric_set in metric_sets. The resulting keys refer to metrics. This includes steering, spring, damper, rocker, ARB, and heave-link dependencies. Supported options are listed in Suspension options.

Derivative units preserve both operands, including mm/mm and deg/mm. These are geometric responses; they do not imply spring forces, stiffness, damping forces, or dynamic simulation.