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Old 02-26-24, 04:40 PM
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oldbobcat
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Join Date: Jul 2005
Location: Boulder County, CO
Posts: 4,411

Bikes: '80 Masi Gran Criterium, '12 Trek Madone, early '60s Frejus track

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Originally Posted by mams99

Specs:
50.5cm (center of bottom bracket- top of seat tube)
52.5cm (center of head tube- center of seat tube)
68mm BSA threaded bb shell
100/135mm drop out spacing
1in threaded steerer
173mm head tube length
27.2 seat tube diameter
Modern bikes use virtualized sizing, which means the nominal size (or advertised size, or the size that it would ride like if it were built traditionally) corresponds to no actual dimension of the frame. Looking at this frame's actual dimensions, after studying hundreds of geometry charts, I'd estimate this bike to be a nominal 55 or 56, or a 54-55 if it's meant to use 650b or 26" wheels. That means it's too big for you. You could install the fork and put wheels on it and see. I would keep looking for a 50 or a 52 with a shortish top tube.

Last edited by oldbobcat; 02-26-24 at 04:45 PM.
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