<nz-slider nzRange [(ngModel)]="value2" nzIncluded [nzDisabled]="disabled">
You can use "nz-form" and wrap "nz-slider" with form control and reduce the width by [nzSpan]
<form nz-form>
<nz-form-item>
<nz-form-label [nzSpan]="6" nzFor="slider">Slider</nz-form-label>
<nz-form-control [nzSpan]="14">
<nz-slider nzRange [(ngModel)]="value2" nzIncluded
[nzDisabled]="disabled">
</nz-form-control>
</nz-form-item >
</form>