Originally Posted by
seau grateau
Suuuper compact. What's it for, cross?
One use is gravel, for extended climbing over loose surfaces where a bigger ring and standing would spin the tire. The 30 ring allows it to be done seated.
Another obvious use is old age. There is a great thread about these cranks in the 50+ forum.
http://www.bikeforums.net/fifty-plus...road-bike.html
-Tim-