I'm currently swapping out the Ultegra 6500 groupset on my '92/93 Orange Dynamo for a more period correct 6400 600 "Tricolor" group, and I'm having issues with the downtube shifters.
The 6500 group currently has 9-speed "brifters" and cable stops on the downtube mounts.
Firstly, I can't seem to get the silver backing plates off the studs.
Secondly, if I do get the backing plates off, the ones from the 600 shifters won't fit the tube profile of the aluminium frame (they came from a steel framed donor bike).
Lastly, the 600 shifters won't fit on the current backing plates as they're of a different design.
So... As I'm pretty sure they didn't make 6500 downtube shifters, what are my options? Is there something that will fit & work with the 600 drivetrain? Any tips for removing the backing plates? I assume they DO come off?
The 6500 group currently has 9-speed "brifters" and cable stops on the downtube mounts.
Firstly, I can't seem to get the silver backing plates off the studs.
Secondly, if I do get the backing plates off, the ones from the 600 shifters won't fit the tube profile of the aluminium frame (they came from a steel framed donor bike).
Lastly, the 600 shifters won't fit on the current backing plates as they're of a different design.
So... As I'm pretty sure they didn't make 6500 downtube shifters, what are my options? Is there something that will fit & work with the 600 drivetrain? Any tips for removing the backing plates? I assume they DO come off?