Originally Posted by
TenGrainBread
Those are Suntour XC Sport Roller Cam brakes. The design was by MTB pioneer Richard Cunningham. They used U-brake mounts but a very different mechanism.
The bike was not entry level. The lugged unicrown fork, black chrome, and Roller Cams were specced on High Sierras and Cimarrons in the mid-80s. So it was either Schwinn's top tier or 2nd from top tier MTB.
Its probably still there I can go back in the morning and see. I think it just said Seirra on it. It looked like it was a pretty big bike. I didn't see a price and some of the stuff there is overpriced but not always.