These are not huge rollers. As a once and still member of the Century
Road Club Association we used to have roller races in the winter on
rollers like these. they had a big dial that showed who was ahead. BTW,
I was, one winter, club roller champion on a set like these. the
problem is getting over the fear of falling off. Its a long way down
but, of course, one always had a spotter in case that happened.
Edward Albert
Chappaqua, NY