John Jorgensen wrote:
>
> Duane Kennard asked did the "trench" in Nuovo Record (fixed) cups coincide with the "77ish change in spindle length?
>
> No, the "trench" showed up in a BB that I installed on my bike in early 1975. Pre CPSC mandates.
>
> 74 BB width was associated primarily with mtb's in my memory, perhaps prior in tandems.
>
> The reverse rifling showed up in staggered fashion, I assume as the "old" stock was used up, we saw thin french cups well after the English & Italian migrated.
My 1960 Cinelli SC has a 74mm BB shell.
Nuovo Record cups...
>From Campagnolo Timeline at http://www.velo-retro.com:
"1967 -- Catalog #15 is printed for the year-end trade shows.
Included for the Record group is the Nuovo Record alloy rear derailleur
and the Nuovo Record bottom bracket (rifled axle aperture cups)."
Chuck "measured the BB drop on my unicycle and its nothing" Schmidt South Pasadena, Southern California
http://www.velo-retro.com (Catalogs Reprints, Timelines & T-shirts)
.