The wristband of the 36-mm model of the Steel HR can be replaced with any spring bar wristband with a width of 18 mm. The 36-mm model is compatible with all the Activité, Activité Pop and Withings Steel wristbands.

The wristband of the 40-mm model of the Steel HR can be replaced with any spring bar wristband with a width of 20 mm. The 40-mm model is not compatible with any of the  Activité, Activité Pop and Withings Steel wristbands.