Originally Posted by
dbakl
How much chain do you need to wrap? I've routinely run 14/28 freewheels with NR for over 30 years, even with triples.
The R, GS, NR, SR, and NGS are all effectively the same design and function more or less the same.
Gran Sport has a different cage design and will not wrap up the same amount as the original steel Record RD, Nuovo Record (all generations), SR first-gen and Nuovo GS. At least, not without undertensioning it in the small-small combo, and likely grinding the forward pulley wheel into the cogs when shifting up the cluster.
Super Record second-generation has a revised pulley cage and parallelogram angle, and may take up more chain then NR. This said, I am not certain - don't quote me on it.
-Kurt