This bike is the ninth Rock Lobster, probably built in 1986. It's fillet brazed out of a mixture of columbus, reynold ans 4130 straight-guage aircraft tubing. The four-bolt stem was specifically built to fit 7/8" Salsa handlebars of the day. This bike predates biopace, Rockshox, clipless pedals and index shifting. I'll be putting up more detailed photos later.....it actually predated the decals which were applied soon after the bike was completed. The three-color paint scheme was the only one offered at the time.