dear moto fans
I am trying to figure out what tubes were used on my 70s Motobecane Track bike. The closest I come to dating the frame are the Normandy hubs stamped 77.
Here is some more info:
-It looks to take a 25mm seatpost, though no 25s i've tried (campy nuovo record, gipiemme) seem to fit, they all appear to be .1-.2mm too thick.
-The original Vitus Rubis 979 seatpost had to be sanded down pretty aggressivly to remove the ZZZ scratches, but with calipers it measures about 24.7mm and goes in pretty easily - wiggles even a bit.
-frame has Bocama cut out lugs
Anyhow, given the above info, can anybody wage a guess? I expect Vitus tubing of some sort. maybe 172?