Not sure of the best place to post this? I will check the infop and see if it's already there. I met a new friend who is 2 years out from TKR and has been pretty down about only having 90 flex. She dreamed of riding her bike again and could not. Guess what? She bought the pedal adjustments from orthopedal.com and is now joyously peddling away! Please check this out if you are having trouble cycling.