Cavechat.org

Has anyone tried one of these? They look rather interesting.

http://www.camp.it/en/template01.aspx?codicemenu=1506

Those rollers look awfully heavy. 110g vs 85g for my Croll. I hadn't noticed that the friction from the shell of my Croll was a problem, more the cam, which this product doesn't address. Also looks like the rollers only make up a small fraction of the total shell-rope contact area, so it appears they would have a negligible effect on reducing the friction. And what happens when you get some mud in the axles...

Helpful in tyros I bet. But otherwise, maybe not worth wearing around all the time.