Wheel Group

Represents a group of wheels that share common properties. Typically used for axles, connecting wheels to differentials and applying brake distribution, steering coefficients, and geometry settings.

WheelGroup inspector

Steering

Property	Description
`Steer Coefficient`	Percentage of steering input applied to this group. Range: -1 to 1. Values: `1` = full steering, `0` = no steering, `-0.5` = 50% counter-steering (e.g., rear-wheel steering)
`Add Ackerman`	Applies Ackerman steering geometry to reduce tire scrub during turns. The angle is automatically calculated based on wheelbase and track width. See Wikipedia for details

Vehicle with Steer Coefficient of 1 on the front axle and -0.5 on the rear axle. Steering wheel turned fully to the right.

Effect of Ackerman setting on steering

Brakes

Property	Description
`Brake Coefficient`	Brake torque distribution as percentage of `Brakes` => `Max Torque`. Range: 0-1
`Handbrake Coefficient`	Handbrake torque distribution. Range: 0-2 (values >1 apply more force than regular braking)

Geometry

Property	Description
`Apply Toe Angle`	Enable to apply toe angle setting to wheels in this group
`Toe Angle`	Angle in degrees. Positive = toe-in (inward), negative = toe-out (outward). Range: -8 to 8 degrees
`Apply Caster Angle`	Enable to apply caster angle setting to wheels in this group
`Caster Angle`	Angle in degrees. Positive angles the steering axis toward the front (improves stability), negative angles backward. Range: -8 to 8 degrees

Toe angle. Positive on the left (toe-in) and negative on the right (toe-out).

Caster angle

Note: Camber is set directly on the WheelController, not through WheelGroup (except for solid axles where it's auto-calculated). For dynamic camber adjustment, use the CamberController component.

Axle

Note: Axle settings only apply when exactly two wheels are in the group.

Property	Description
`Is Solid`	Simulates a rigid axle connection. Automatically calculates camber based on suspension travel difference between left and right wheels, keeping them parallel
`Track Width`	Distance between left and right wheels (automatically calculated)

Anti-Roll Bar (ARB)

ARB is now configured on individual WheelController components, not on WheelGroup.

Set ARB Stiffness and ARB Damping on each wheel's WheelController for proper substepped physics integration:

Property	Description
`ARB Stiffness`	Torsional stiffness in Nm/rad. Road cars: 500-5000 Nm/rad, Race cars: 10000+ Nm/rad, Off-road: 0-1000 Nm/rad
`ARB Damping`	Damping in Nm·s/rad. Typically 5-20% of stiffness

Legacy WheelGroup ARB settings are automatically migrated to WheelController on initialization.