Join Date: Jan 2008
Location: Aurora, IL
Bikes: '73 Raleigh RRA, 1986 Trek 500 commuter
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For a 1973 Bianchi, the spacing is almost certainly 120mm (measure the rear dropouts across the verify). Normal 6/7 speed spacing is 126mm. Modern cassette hubs are 130mm.
1) Not sure why you want to go to 27" wheels (instead of 700c, which is far more common these days) Were the original wheels 27" or 700c?
2) Since it is a steel frame, the rear triangle can be spread. Normally on 126mm spaced frames, it is no big deal to put a 130mm hub in (2mm per side). Many people cold set
the frame to 130mm though (or have a shop do it). On a 120mm frame, trying to cram a 130mm spaced wheel in might not work so well.
3) 1970s Bianchis aren't so common, so unless it is an entry-level frame, doing things such as this to it might not be the best thing. It is your bike however.
These wheels might be a better choice... http://www.velomine.com/index.php?ma...oducts_id=1570
EDIT: post pics of the bike, including drive side shots, and we may be able to provide more help
Last edited by Pars; 09-10-13 at 10:27 AM.