Originally Posted by dddd

This one is almost entirely original, early-90's Performance Parabola "Road Hybrid". Bought a pair of them from Goodwill for $80 about 15 years ago.
It uses huge dual-pivot calipers with cable-release QR arrangement to accommodate huge tires. Tange Infinity DB CrMo tubing and unicrown fork w/1" steerer.

I used it for lots of mtb trail riding and a half-dozen CX races over the years.