Nevertheless, knee injuries do occur, usually as a result of poor technique or position. A principal cause of knee problems is over-stress as the result of using too high a gear. For more on this, see my article on Gear Shifting . Another common cause of knee problems is incorrect saddle adjustment, particularly if the saddle is too low. See my article on Saddles for more details on this.
Some knee problems result from incorrect placement of shoe cleats.
When you walk or ride with plain pedals, your foot assumes this angle, and everything is hunky-dory. If you use cleated shoes and matching pedals, it is important that the cleat is adjusted so as to permit your foot to be at its natural angle. If your cleats are misadjusted, the resulting twist on your lower leg will affect the alignment of the knee joint, and cause serious problems. Most newer clipless pedals offer at least some float. Reputedly, an edge of this cartilage can get turned up and dog-eared, causing irritation and inflamation.