Originally Posted by hairnet

It just means the fixed gear masked the dead spot in your pedaling and the geared bike revealed it.

you're right hairnet. I get lazy on the fixed bike and let the pedal come up and the geared bike makes it really clear quickly! I would think it would be a bit easier to climb a short steep hill fixed than SS for this reason, but I don't know for a fact and have no intention of testing that out-far too lazy.