Mongoose Hill Topper. 1987? (hub has date 86 on it). 23" top of seat tube to center of crank (59cm?). 33 1/2" stand over height. 12 speed. Frame: Chromoly 4130 tubing. Derailleurs: rear, Suntour alpha-3000 front, Suntour alpha-3000 shifters, Suntour alpha-...