Bike Q - 9spd, etc...and old 6spd

OK…just a component question from a non-mechanical type…

My old Univega (3rd bike/commuter bike) has good old Suntour 6spd on it…can this be upgraded to 9spd components??? - I figure that as 9spd becomes old school, I can clean up on some cheap 105 or ultegra cranks, shifters, the whole package…

??
-Ron

  mmmm, rear hub spacing on your six will be 126, where from 8spd on the spacing is 130.  So no, not a direct fit, but you can get the rear coldset(steel frame, right?) to the wider spec.  Of course you'll need a new rear wheel (or at least hub), as the 9spd is a freehub and your 6 is freewheel.  The rest of the stuff will mount up fine, but most will not do the change unless they reeeally love the frame.