Originally Posted by JoeyBike

Speed is your friend in sketchy neighborhoods. It takes time to formulate an ambush. Not much, but you want to be gone before they can act on their impulse.



I used Biopace on my smallest chainring and really liked it. My 1988 Cannondale ST1000 came with Biopace on all three rings. I got rid of the larger two rings and went round. I really think the Biopace helped on long, steep climbs with the loaded-down touring bike. Same reason compound bows use elliptical shaped pulleys. There is a slight benefit at one point in the rotation where the force of pulling the bowstring is greatly reduced by that shape - two points of benefit on a bike crank of course. Just my take.