Originally Posted by
PiLigand
Huh. Everything I find is saying they're heavier than 10%...
OK, I stand corrected.
keep in mind that you would need that net 75N upward in order to get your leg back to the top of the crank - whether that force is made by your lifting or pushing and transferred through the crank is irrelevant.
Well, here's the hitch. Any force that is used to lift your leg is force that doesn't make it to the drivetrain. If you need 100N to pull your leg up, and only happen to produce 90N on the upstroke, that's 10N which doesn't propel the bike.
I'm really surprised that there isn't more consistent force applied. I FEEL like I do a much more consistent force than that diagram shows, but of course I couldn't tell you that definitively, and it would just be me.
Yep.... The bike is basically a two-stroke engine. The illustration in post
#85 in this thread makes that quite clear.
The closest I have to real evidence to that is even when using cages (commuter bike) I find my feet slip out the back since I'd started using SLRs. Still, you're going to have me very pedal-conscious on the next few rides XD
Heh
Yeah, losing contact will definitely not help. A good pair of platforms will have enough grip for most uses, though it will almost certainly not be sufficient for some situations (e.g. high-cadence high-power sprints).