Originally Posted by
sp00ki
the problem isn't the distance, or even the tempo, it's the grades. the only thing separating doing 100 miles on a fg and doing it on a geared bike is the hills. once they start turning into mountains, you should reconsider.
+1
I've ridden a century on my FG in the hill, and on the flats. I find it easier than my geared bike on the flats, but in the hills/mini-mountains it can be brutal.