Originally Posted by
Positron400
Someone saw my other thread
Yes, I am considering friction, and honestly, if I were to build it for me, I would immediately, without a doubt, go downtube (or maybe barend) friction. But since I (might) build it up for someone else, I want ease of use in terms of indexing.
I just measured, and If my calippers are not totally out of whack, i'd say they are 23.8 mm diameter
Being a radonneur-style drop bar, that's what I'd expect.
Well, that limits your STI choices somewhat (e.g., to Shimano drop bar STIs, or those from other manufacturers that are Shimano road compatible). But you still should have plenty of options if you decide to go that route.