Originally Posted by john bono
Just checked that out. On the plus side, when I cruise, I'm putting out somewhere between 500 and 800 watts. On the downside, that only translates to 17mph.
LOL you must have made a serious mistake. In his peak Tour de France form, Lance Armstrong could "cruise" at around 470 Watts, IIRC. You may be a bigger person but I find it hard to believe that you could sustain that sort of wattage.
Also, Looty, I didn't read carefully: the others are right. Your chain doesn't magically shrink when you go in the drops so for a given gear your cadence and speed are in a direct linear relationship.
Edit: by "cruise" above I mean "max sustainable", i.e. that's the most he could put out and hope to hold for say at least a half hour (i.e. power at threshhold, all that jazz).