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Help!! Bianchi Sprint specs 76

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Help!! Bianchi Sprint specs 76

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Old 07-12-18, 07:24 AM
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walteriano
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Help!! Bianchi Sprint specs 76

Hi Everyone,
my name is Walter and I'm from Italy. This year I've bought a Bianchi Sprint and I'm going to partecipate to Eroica next october.
As you can see from the image I need the exact value of the diameter of the saddle tube.. the former owner used a wrong tube (smaller) tithing too much and slightly bending the frame.. as a result the saddle continue to move.. after the purchase with the help of a good mechanic I fixed the situation with a bigger tube that works much better but is modern.. so I want to buy another classic tube with the right diameter..
Is there anyone that owns this great bike and could help me to know this information..? inch or mm is the same

Many Thanks,
Walter
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Old 07-12-18, 08:13 AM
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T-Mar
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The Bianchi Sprint variants which I've seen were built with Columbus Zeta tubing, which typically used a 26.6mm seat post. However, Zeta only goes back to 1978 and I'm not familiar with a 1976 Bianchi Sprint. The 1974 and 1978 catalogues do not show a Sprint model. so a 1976 Sprint seems unlikely. If there a tubing decal? What is the serial number?
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Old 07-12-18, 08:21 AM
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wrk101
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Personally I would just head to the closest shop in your area and get it measured. On a bike this old you could also have a problem with a deformed seat tube top where the prior owner overtightened it. So getting that top lug at the top of the seat tube back to round could be some work.
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