I need short cranks and don't know where to find them! I'm 5' 1" and have a new Trek WSD 7.5 that comes with 170cm cranks. Also, my left knee has slightly less that 90 degrees of flexion. So, I need to shorten up on the cranks. I also don't want to spend an exorbitant sum of money on these. I met with a custom bike builder this morning, Lennard Zinn, and to get what I really need (142cm on the left; 165cm on the right) will cost close to $600. Does anyone out there have a more practical solution? A crankset with
155cm or 160cm crank arms will do, too. I just can't find them.