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Bianchi Thomisus sizing

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Bianchi Thomisus sizing

Old 12-20-21 | 05:05 AM
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Bianchi Thomisus sizing

hi,
i would like to know how the sizes of an old MTB bianchi thomisus really work (and in general in that range of bianchi´s 90´s MTB: theridion, ragno, etc.)
i mean of course in what sizes they were originally offered, but also what do these seizes mean (do e.g. a size 50 on these old MTBs actually mean 50cm center to center? and would this correspond to the standard road bike size 50?) i would very mach apreciate some orientation with that...

thanks in advance!

here´s a photo from the internet:
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Old 01-09-22 | 09:53 AM
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I´ve found all the information i was looking for in an italian facebook site: "Biciclette Bianchi Ragno" lots of information, pictures, catalogues, etc.
just in case there is also someone searching for more info on this bike.

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Old 01-09-22 | 10:44 AM
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Old 01-09-22 | 11:45 AM
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How did I miss this? Bianchi USA cataloged one in ‘90 called the Signature 2 but I’m not sure any were imported.
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