Stimulated by a commitment to do an MS150 ride, I've been back on the bike (borrowed...a size or so too small) for about 6 weeks, logging approximately 75 miles a week. I have noticed on harder rides (cadence 90+ / speed 15mph) my right knee, directly behind the patella, hurts. Not huge pain like a cramp, but it's noticeable. I'm worried about logging bigger miles on the MS ride in one month with this knee thing. I've never injured the knee that I can recall. I've thought about "glucosamine doping" but I'm wondering if anyone has some ideas. Could it be the bike being too small, even if I'm in a decent riding position? Would knee pain be symptomatic of having the saddle too low or too high? I think if anything, I"m too low.