Originally Posted by
Dropout
Thanks for the thoughts! Measured C to C, the down tube is 60cm (23.5 in), the top tube is 57cm (22.5 in) and the wheelbase is 101cm (40 in).
this is indeed very aggressive geometry, not Cannondale criterium frame aggressive, but still... Here are a couple of examples
a 57 cm ST Trek 770 has a 57 cm TT and 99.2 cm wheelbase. This was considered an aggressive racing bike. Yours is more agressive. Exactly as aggressive as a Gios compact frame which on size 60 has a 60 cm ST and and a 57 cm TT (cannot get wheelbase numbers.)
to compare your 101 cm wheelbase, this is the exact wheelbase of a KHS Aero Turbo frame I have, which has 49 cm ST and 52 cm TT (this is a light touring bike)...
I would probably concur that, based on the fact that you have a British BB and on the era of the bike (early 70s) it is probably a custom frame. If you had an italian BB, it might be a different story
