# Interface: WheelJointOpt

Wheel joint definition. This requires defining a line of motion using an axis
and an anchor point. The definition uses local anchor points and a local axis
so that the initial configuration can violate the constraint slightly. The
joint translation is zero when the local anchor points coincide in world
space. Using local anchors and a local axis helps when saving and loading a
game.

## Extends

- [`JointOpt`](/api/interfaces/JointOpt)

## Extended by

- [`WheelJointDef`](/api/interfaces/WheelJointDef)

## Properties

### collideConnected?

> `optional` **collideConnected**: `boolean`

Set this flag to true if the attached bodies
should collide.

#### Inherited from

[`JointOpt`](/api/interfaces/JointOpt).[`collideConnected`](/api/interfaces/JointOpt#collideconnected)

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### dampingRatio?

> `optional` **dampingRatio**: `number`

Suspension damping ratio, one indicates critical damping.

***

### enableMotor?

> `optional` **enableMotor**: `boolean`

Enable/disable the joint motor.

***

### frequencyHz?

> `optional` **frequencyHz**: `number`

Suspension frequency, zero indicates no suspension.

***

### maxMotorTorque?

> `optional` **maxMotorTorque**: `number`

The maximum motor torque, usually in N-m.

***

### motorSpeed?

> `optional` **motorSpeed**: `number`

The desired motor speed in radians per second.

***

### style?

> `optional` **style**: [`Style`](/api/interfaces/Style)

Styling for dev-tools.

#### Inherited from

[`JointOpt`](/api/interfaces/JointOpt).[`style`](/api/interfaces/JointOpt#style)

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### userData?

> `optional` **userData**: `any`

Use this to attach application specific data to your joints.

#### Inherited from

[`JointOpt`](/api/interfaces/JointOpt).[`userData`](/api/interfaces/JointOpt#userdata)