My wife finally decided she was willing to ride to lose some weight so I have spent the last few days trying to resurrect her bike, a 1991 Marin Muir Wood. She hasn't ridden it in about 18 years, so I was afraid of what I might find. But after cleaning it up a bit, degreasing and then regreasing the shifters and derailleurs everything is working ok. I did have to put some new tires on it of course, but other than that, it is stock. When I rode it around the block to test it out, I remembered how much I hated the "biopace" chain ring