  Great bike that_guy_zach! I vaguely remember Rock Combo model but had totally forgotten about it. Cool story behind the frame, sneaky Mike Sinyard getting another NorCal builder, Scot Nicol, to create and answer to Grant Petersen's Bridgestone's MB-0. That guy has got some tires on him!!! It appears that the Rock Combo was only made in 0000, any idea how many are out there? I've never seen one for sale around SoCal in my 00+ years of building bikes. I dig the steep angles of the head tube and seat tube! How does it handle in the drops?  