[IONC ion range] Set minimum diapason between sliders

Ionic Framework ionic-v3
1

I use the ion-range with 2 knobs, min =0 and max =100, I want to position the minimum between the sliders
for example, the left knob is only allowed to drag from 0 to 50 and the right knob is from 50 to 100.
Can you help me with this? Thank