I recently picked up a nice older 80's Miele frame and I want to build it up into a stylish beater bike that I can lock up and not worry about it.

Its a BINOVA with Plain Gauge Ishwata 4130 tubing. Lugged, fork is ok, etc.

Now, the geometry kinda throw me a curve.... It has a 52.5cm Seat tube and a 56-57cm top tube.. c-c ..the bike has eyelets for fenders (which will go on) but I haven't really heard of bike frames designed with more than a cm or two of top tube compared to seat tube.

I don't know the Seat tube/head tube angles....

Speaking of seat tube, does anyone know the standard for Ishiwata tubing? i thought maybe 27.2mm but only my 26.8mm fits snugly...

thanks in advance!