> I have an atala grand prix aprox. from 68-70 it has
> a rear dellairur campagnolo valentino extra...
Diego,
For whatever it's worth, I'm certain your bike must be from
the (early) '70s. The Atala Grand Prix bikes I saw during the
'60s all were made from Columbus tubing and equipped with
Record hubs and derailleurs (or NR for the RD in the case of
later bikes). Also, most (all?) had the TTT Gran Prix stem:
http://www.employees.org/
But as Sheldon suggests, change that RD! Any modern $25 Shimano thing will work just fine. On my brother's bike, I replaced the Valentino with a Suntour VGT. (This was around 1975 but you can still find them around if you want the bike to remain "period" in appearance.) Anyway, the difference was dramatic even with an ordinary, black Regina Corsa freewheel. Best regards, Fred Rednor - currently in Arlington, Virginia but once upon a time from 15th Street in Atala-land
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