var collider : Collider

Description

The other Collider the wheel is hitting.

    // When attached to the WheelCollider, modifies tire friction based on
    // static friction of the ground material.
    function FixedUpdate() {
        var hit : WheelHit;
        var wheel : WheelCollider = GetComponent(WheelCollider);
        if( wheel.GetGroundHit( hit ) ) {
            wheel.forwardFriction.stiffness = hit.collider.material.staticFriction;
            wheel.sidewaysFriction.stiffness = hit.collider.material.staticFriction;
        }
    }