Over the weekend I bought a bike for a co-worker that wants to start cycling, an older Univega Gran Tourismo. It has an older (obsolete) SR APEX triple crank with a BCD of 118. It seemed to drive ok when I tested it, but apparently I didn'y ride it long enough or hard enough when checking it out. After overhauling, cleaning, and gettign it ready to roll, the shakedown cruise revealed a serious issue.

The problem is that it seems the teeth on the outer chain ring are rounded over enough that when you get going pretty good the chain slips and jumps over the teeth in a random (and sometimes painfull!!) fashion. It works ok on the stand, but under real world load it skips. I've checked the BB, the FD, and the alignment of the chain rings - nothing's bent or broken, and the FD has been R/R'ed with no success. I'm pretty positive the worn teeth on the outer chain ring is the culprit.

So, I'm begging here. I tried to be altruistic and do a newbie a favor, and it bit me in the ass - big time. Does anyone have one of these rings, a decent triple crankset that they can part with, or even a link to where I can buy one?