I'm a bit confused; in the photo it appears that Larry has the least amount of bend to his knee which should mean that his max degree is a higher number rather than lower...but you seem to be saying the opposite. 100 degree angle is more open than 90 degrees, right?
I have the BB so far in because I had problems keeping traction with it farther out. With the BB farther out, it allows me to really pull on the upstroke, which was causing my power to spike real high in one spot of my pedal stroke which caused wheel slip. With the BB in closer, I really have no power on the upstroke pull and have to spin faster, but at least no wheel slip.
The 110 degrees,
around the top of the knee, is the amount of bending of the knee, when the pedal is closest to the rider, from the leg fully extended, with calf and thigh bones aligned.
Try doing a swat so the knee angle is 90 degrees, then stand up, while having someone on the side of you to tell you the knee angle, then try it at 110 deg. bend,, and try and stand up!
The 110 deg angle is a LOT harder to stand up.
A more scientific test is to do leg presses at 90 and 110 degrees knee angles and see what weight can be pushed!
For an older guy like me, going from 175 to a 153 mm crank, extended the severe knee pain from 3 hrs, out to 6 hrs of
touring riding!
