Well, if weight savings is what you're after, you gotta go whole hog - Halibrands with BB's.
Mixing bias and radials with mags and ally
with weight in mind isn't gonna get you far.
Stick with the Trigos, especially now that we've come to the point of manufacturing patina....and preserving it
... but for God's sake, mount some Avons on there.
Being on the East coast, you're gonna have to stay up late to get those numbers. I won't get home until 9 (PST) tonight and even then I have to remember.
And on top of that, remember some fancy equation that will end up turning Archimedes in his grave.