If the ranges can be more leveraged more information can be visualized in a single gauge and it allows for creating "custom bars".
The pointer value already accepts a margin.

Example:
 scale: {
                            majorUnit: 20,
                            minorUnit: 5,
                            max: 180,
                            ranges: [
                                {
                                    from: 80,
                                    to: 120,
                                    color: "#ffc700",
                                    margin: 10
                                }, {
                                    from: 120,
                                    to: 150,
                                    color: "#ff7a00"
                                }, {
                                    from: 150,
                                    to: 180,
                                    color: "#c20000"
                                }
                            ]
                        }