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Leg Bend(3 posts)

Leg BendBC
Feb 12, 2002 5:07 PM
How much is your knee suppose to bend when your crankarm is perpindicular to the ground? Currently, from calculations on WrenchScience, my seat is around an inch too high. Should I lower it? It feels okay on my right leg, but my left has some trouble spinning really fast and smooth.


From the custom fitting done on me...Cima Coppi
Feb 13, 2002 8:30 AM
I was told that the proper saddle height creates a 30 degree bend at the knee when the crank arm is in the 6 o'clock position, with my foot level to the ground.

This works great, but it is way off the .883xinseam calculation often used for fitting. This measurement is used to set the saddle height as measured from the center of the b/b to the top of the saddle.

re: Leg Bendwsexson
Feb 13, 2002 1:12 PM
The saddle height that I got from Wrench Science really works for me, but fit and comfort are different for each rider.

One "guideline" for saddle height is that your leg should be fully extended when your heel is on the pedal at the bottom of its rotation. This means that your knee should be slightly bent when the ball of the foot is on the pedal.

Have a friend watch you ride, and if your hips rock back and forth when you pedal then you should lower the saddle a little until the rocking goes away.