Photo by Vicky Jost
PJAMM will ride and document this climb in June, 2018. We have confirmed with several Strava members who have ridden this climb that it can be done on a road bike:
Mauro Curtoli hello since the tzoumaz it is no longer tarred and even if the slope is not steep some places the road is not very good but possible to do with velo racing me had tires section 25 mm cons down descent on verbier gouronné
Dylan Page Yes, it is a gravel road that goes by road bike.
Steepest Gradients by Distance
Steepest kilometer starts at km 1.7 (10.6%)