Granny vs. the hill

Sheldon Brown wrote:

Actually, when you get "too low" the limit is often the tendency of the
bike to "wheelie" which is partly related to the frame geometry and
rider height.

Once you get below about a 1.5 gain ratio (20 inches, 1 meter) the gears
tend to become impractical for a bicycle.

Tricycles can effectively use lower gears than this in some cases.

Sheldon "Greenspeed" Brown

Sheldon Brown has been assimilated.
http://www.sheldonbrown.com/harris/greenspeed/index.html.

--
Tom Sherman