How much does singlespeed slow you down?

I'm gonna do the same route by bus just to check. I think the Milland bus goes on a Tuesday and the one I need after that goes on a Friday.

ha ha ! try it on a bmx too. i rode the isle of skye on a bmx, as a kid. point blank refused to give any quarter to my family i was riding with, all flexing their gears at me. cheats ! ;0)