The formula I have used to milk more capacity out of that derailleur is to set the axle stops as far back in the dropouts as they will go and use the shortest possible chain that will still wrap the 52/28 combination. I have used an early 70's NR (older cage shape, smaller capacity) with a 39/52, 13/26 and with a 42/52, 14-28. This derailleur doesn't really have a problem with the cog size, just with how much slack chain it can absorb. David Feldman
> In a message dated 3/12/01 8:04:46 AM Eastern Standard Time,
> youngc@netreach.net writes:
>
> << I have a Pat. 71 Nuovo Record rear derailleur on my Italvega
> paired with a 14-28 freewheel. It bumps on the 28t cog, rendering that
> combination useless. >>
>
> Chas:
> I ran a 14-28 and 52-38 (Stronglight 93) for years on my chromed
Paramount,
> so it can be done without "bumping." That was in 1972-76 so it also was
not a
> later pulley cage design...
> BUT, it takes just the right amount of chain, just the correct position in
> the drop outs, and exact adjustment... I guess it is possible that with
> certain makes/models of dropouts that it still might not work, but it is
my
> memory that Campag 1030A (which the Paramount had) are closer in their
> relative position to the cogs and that a newer dropout design would help
> rather than hurt set up...
>
> Dale Brown
> cycles de ORO, Inc.
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