1988 Miyata Ridgerunner Team MTB, $90 OBO @ Fort Collins CO area, CraigsList.
Frame size "medium" and condition "fair." Triple-butted (splined) chromoly tubes. Appears to have the Shimano Deore DX drive train. With a non-factory tweak to the stem and bars. But it might make a good project for someone looking for a bulletproof commuter or on/off-road ATB.
"Super sweet 1988 Miyata Ridgerunner Team mountain bike. Not quite working order in need of brakes and chain. However this is a vintage bike that you will see no where else. Be the envy of your friends with this awesome bike that started the mountain bike craze!!!! If I had money, time, and skills I would fix it up myself. I just thought it would be super cool to ride someday when I could get around to it. But that isn’t happening anytime soon and I need more space in my garage. So it’s your lucky day!"
