One way is, you can format your datalabels and return nothing in the formatter () function.

 dataLabels: {
     formatter: function () {
     var kmh = this.y,
     mph = Math.round(kmh * 0.621);                

Fiddled version. (tweaked from Highchart demo sample )

Hope this is you need.


Another option is

dataLabels: false

Documentaion: Gauge DataLabels enabled

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