Originally Posted by runner3344

I have been told that for people like me with limited flexibility in a knee joint that a person can buy shorter crank arms or bolt on crank shorteners that will allow me to ride mountain bikes again.( Ortho pedals ?) Does anyone know anything about this ? Or have first hand knowledge ? I cannot bend my knee past the 90 degree mark and this makes it just about impossible to complete a circle while pedaling. Any help with this problem would be greatly appreciated. I tried just raising the seat but that didnt work.