Originally Posted by
ElliotSF
The brazed-on knob thingie on the drive-side seat stay is a chain peg / chain hanger.
Originally Posted by
steine13
>> knob thingie
It's a chain hanger; keeps the chain from flopping around when the rear wheel is removed but the rear derailer is still in place.
cheers -mathias
Thanks! Both for the answer, and the absence of ridicule.
I gotta wonder why they'd put a luxury (?) appurtenance on a super-duper racing frame, at a time when it was stylish to drill holes in alloy components to save a few grams. Plus, if I rode a Team Pro, I'd like the guy from the support van to hop out and take care of these little details for me. (These are philosophical musings, not a question.
)