Exactly! That is, I think the Campy hubs were designed with
the expectation that either:
1) you would use a Regina freewheel, or
2) your frame builder would have indented the inside surface of
the stays so that there was more clearance.
You might consider spacing the hub at 122mm, with those 2 extra
millimeters on the freewheel side. I remember doing this in
"days of yore" when replacing Regina freewheels with Suntour
parts.
Best regards,
Fred Rednor - Arlington, Virginia (USA)
>
> Doug Van Cleve writes:
> > I am getting ready to respace my 126mm Campy rear wheel to
> > 120 and it would be helpful to know what the dimension is
> > from the outer edge of the hub shell to the outer edge of
> the
> > locknut on the freewheel side.
>
> 30 mm, from the shoulder that stops the freewheel from
> threading on any
> further (near the spoke flange) to the outer face of the
> locknut. This
> is given as 29 mm on p.92 of Catalog 17, but most hubs I've
> measured
> were 30. Even 30 mm is tight on most frames; On some frames,
> the domed
> seat stay ends aren't flattened or ground down on the inside,
> so extra
> space is needed on the axle, to avoid the chain hitting the
> seatstay
> when shifting. Any extra space there increases the dish of
> the wheel
> though, weakening the wheel, so keep it to a minimum.
>
> Some brands of freewheel are wider there, so if your
> Cyclo-Pans (for
> example) causes the chain to rub on the frame, try a Regina,
> they're
> among the narrowest of the old style 5 speeds (not talking
> about
> "Ultra-" anything). Just 1 or 2 mm narrower than some other
> popular
> brands, but sometimes that's enough to keep the chain from
> hitting.
>
> That 29 or 30 mm dimension was not a standard in the classic
> era by any
> means - you'll find many brands of hub were quite a bit wider
> there even
> for 5-speed freewheels. Just one of the reasons why Campy
> was
> considered the best - they sweated the details like this
> (minimizing
> wheel dish).
>
> Mark Bulgier
> Seattle WA USA
> _______________________________________________
>
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