
By '97, down-tube shifters are out for sure, but the bosses seemed to hang-around for a good while - presumably because of the adjusters? A quick look at some top end Colnago Shimano equipped road bikes seems to suggest the down-tube gear lever boss disappeared around 1999 / 2000 in favour of a barrel adjuster insert in a normal cable guide.
I think it will be cool with a down-tube shifter there



Likewise, that's a great find that catalogue. From the geometry (and what a messed up geometry table that is mixing metric and imperial
