Richmond Park Winter Training 2009/2010

So... is it cool to do this with a geared bike, or not? I couldn't really make conclusions fromt he above.

Either that or I'm on 49/14, which I know I can do the park in 20mins on.

That's 92 GI! Bit high isn't it? Do you have to disassemble and regrease and your knees after every ride?