just inherited this vintage mountain bike from my brother-in-law who was cleaning out his garage. I took it cause it's cool and will be all sparkly when I get done with it. Not sure the manufacturing date but guess it's mid to late '80's with its 6 speed tranny setup with 3 rings up front (18 sp)..Everything is there and works and shifts smoothly! It's a hard ride compared to my main fully mtn bike! Bone jarring off road!