Even though the DO spacing thing makes sense, shouldn't there then be on-topic spindles marked "126" then?
Kurt Sperry Bellingham WA USA
On 8/30/07, Chuck Schmidt <chuckschmidt@earthlink.net> wrote:
>
> Ken Freeman wrote:
>
> > Something doesn't sound right here. I had my '80 Masi cold-set
> > from 120 to
> > 126 right after I got it, years back. The spindle was not
> > replaced, AFAIK.
> > The chainline was correct, both measured and based on even shifting
> > and
> > wheel dish, in both cases.
> >
> > If I'm going to add a gear to a 5-speed, and the wheel will be re-
> > dished,
> > and the cluster must remain centered on the crankset center plane,
> > then why
> > should the distance from the crank center plane to the frame center
> > plane
> > increase, due to addition of rear cogs?
> >
> > The consequence of Chuck's claim is that every time a frame is cold-
> > set, the
> > BB must be considered for replacement. I never heard this before.
> >
> > Ken Freeman
> > Ann Arbor, MI USA
>
>
>
> Ken writes, "The consequence of Chuck's claim is that every time a
> frame is cold-set, the BB must be considered for replacement. I
> never heard this before."
>
> This is troubling to me Ken. It is not my claim that 120 marked on
> the center of the Campagnolo axle refers to dropout spacing. Are you
> saying that you don't believe it? And who claimed that there are
> different Campagnolo BBs axles made for 126 mm spacing or 130 mm
> spacing and that they need to be replaced when cold setting the
> dropouts to a different dimension?
>
> Campagnolo track (Pista) axle markings in Catalog 17 (1974):
> 65-P-110
> 68-P-110
> 68-P-120
> 70-P-120
>
> Campagnolo road (Strada) axle markings in Catalog 17:
> 68-SS-120
> 70-SS-120
>
> QUOTE:
> -- The first number indicates the bracket width
> -- P indicates track
> -- SS indicates road
> -- C indicates cross
> -- Number 110 or 120 indicates the suggested width of the rear hub
> for a perfect chain alignment
>
> I made no claim (I would have written "this is only my opinion" if I
> were making a claim)... I was just quoting Campagnolo. And there are
> no consequences to bottom bracket axle dimensions every time a frame
> is cold-set other than the act of cold setting a frame should be
> carefully considered before proceeding. That would be the reason you
> never heard of this before.
>
> Yes, something doesn't sound right here.
>
> Chuck Schmidt
> South Pasadena, CA USA
> http://www.velo-retro.com (reprints, t-shirts & timelines)