Why the Camapgnolo Nuovo Record RD is so much popular. I have one and it works really good, and it is light, but also it is not the lightest? What is so magic about it?

It had a 25 year +\- run as being the best performing derailleur. From about 1960-1984 the NR SR derailleurs worked well.

Campagnolo also provided phenominal support for their products. Often their van could be found at ameteur races (cat1-cat3) troubleshooting problems for racers and non-racers often for no charge. They built up a lot of goodwill with this.

Let' not forget beautiful and nearly indestructible.

this thread is worthless without .....

Here ya go.

Plus they just taste better. (?)

and less filling.

in my opinion, one of the best looking rear derailleurs...

I agree

Mine works really well.

I never considered them especially light. A comparable Simplex was lighter and later the Huret Jubilee was the lightweight standard. The Suntour Cyclone was also pretty light though and shifted better.

The industrial design and quality of materials and manufacture was outstanding for its time.

They shift kinda slow, and you have to pull the lever a little further than you might be used to to get to the next bigger cog,.....but they are definitely rugged/bulletproof and will keep working with the minimum of attention from you, service-wise (even with cracked jockey wheels).......And I suspect that they made millions of them.....Plus they look very pretty in the most classic sense!

Chombi

Because it was the ultimate when we were all young and new to this.

Plus, they won a LOT of pro races using that derailleur.

Hey, how's come you guys don't have the little black adjuster screw protecter dealy-bob? Like this, but there are 2, if you look hard enough. Must be just a minor change, this one's PAT. 81, near the end of production. EDIT: I see now, that Michael Angelo has them too. They must be a speed governor kind of thing, that they make the faster guys use, to give you pokey guys a chance.

My Pat. 83 NR RD has them too, but my Pat. 72 doesn't....
As I already noted in another NR RD tread some time ago, Those black plastic horn shaped doo-hickies, were mandated by the CPSC to prevent cyclist from having their balls torn off by those killer adjuster screws when they crash......
Just as the DOT mandated extended bumpers on all cars in the early 70's.....


Chombi

Also, you can take them off...if they bother you. But keep an eye peeled for the safety police. And you might want to wear a Kevlar jock strap too.