chico81 

hi all,

I am restoring a late 60’s Frejus and the jockey wheels/pulleys from the rear derailleur are cracked. Does anyone know of a replacement part for these? I do not need them to be, OEM as would rather not spend $100 on the bay. I just want something that would work!

they have 9 teeth, and are much wider than other jockeys that I have on hand. I have a shop that stocks old derailleurs for parts, but is an hour drive away, and there is no guarantee that he will have them on hand, so I would like to know what will work and call him before heading over.

Thanks!

verktyg 

There are lots of theories why the 35 to 50 year old Campagnolo derailleur pulleys crack like that. A Google on the subject will come up with a lot of discussions.

Soma makes some "Faithful copies of a classic Campy style" 10 tooth knock offs with the same dimensions as the originals for $35.00 USD list.

https://store.somafab.com/sonujowh.html

Never looked into the pros and cons of 9 tooth vs, 10 tooth pulleys so I can't comment. Google this too.

Here's some Shimano made 10T pulleys that will fit Campy NR RDs on eBay for $19.00 shipped:

https://www.ebay.com/itm/2-New-Vinta...QAAOSwmYFcc2oo

verktyg

Chombi1 

They all pretty much crack at the seam where the plastic flowed from two sides and met inside the mold you will see it in the flow pattern visible on the surface of the jockey wheels.
The plastic must have cooled too much before the mold was filled so it did not fuse very well at that point and presented a weak point where they crack, after 20 or so years.....

rccardr 

The Shimano 10 tooth ones fit fine and work great. That's what I have on the SR RD on my Colnago.

gearbasher

https://www.amazon.com/Shimano-Derai...gateway&sr=8-6

iab

9-tooth. Nice. You could very well have a first gen RD. Worth a pretty penny. You could sell it and buy a half dozen later versions of the Nuovo Record. Use those until they wear out.

top506

I like these, from V/O:



Top

verktyg 

The Pulleys on Amazon are for 6-7-8 Speed RDs and are probably a little narrower. The original Campy pulleys are 10mm wide if I recall correctly.

The links that I posted above should be for 10mm wide pulleys.

verktyg

gearbasher

According to the first user's review, he measured 10.1 mm.

verktyg 

That's good to know. I have some Shimano pulleys NIB. I'll have to check the part number and measure the width to compare them with the Amazon offering.

verktyg

crandress 

+1 on the Soma pulleys. I got some new on eBay cheaper than from Soma.

Mr. 66

I put new jockey wheels on a NR for my clunker, I pulled them off an old Suntour.

repechage

It's an early one, but not the earliest. This one does show the brazed on section for the cage limit screw, the very early units used the cylinder of the spring case with an extended section that rested against the lower knuckle.
I could see that might not be that strong and or a real bear to assemble.

The Nuovo Record rear mechanism reminds me of the original Volkswagen Beetle, over time till the Super Beetle, looked the same but was not.

SurferRosa

Search "shimano ty05" on ebay. These are $5 (shipped):

new shimano ty05 wheels on ebay

Manny66 

Unless your planning on entering your ride in a Concours' event, just buy an old quality deraileur and swap out the pulleys. Or like people have said,go the Ebay route and buy new ones for under $15. Ive done it a couple of times with no ill effects and the deraileurs work just fine.

BTW, I have about 3 Nouvo Record deraileus all with the same crack in the pulleys.

chico81 

Wow! Thanks everyone for the advice! After seeing you can use old Suntour pulleys, I remembered that I have an old suntour derailleur that I’ve had for like a decade. I will try to find it and try it out, if these don’t work I will probably go the eBay route and get the Shimano ones for $5.

Im going to keep the old and cracked 9 tooth ones, just in case I sell it and the new owner wants a wall hanger in original condition.

Thanks again everyone! I continue to learn so much on here everyday and I appreciate the knowledge and support!

verktyg 

Yes, those are indeed 10mm wide and at $5 that's a great price!

I have a couple of NIB sets otherwise I would have grabbed some more. (didn't want to hog them up so that someone who really needs a set could get one).

They fit 5-6-7 speed Simplex RDs too.

verktyg

chico81 

So, pulled a pulley from my old suntour and noticed the diameter of the pulley is quite a bit larger than the original 9 tooth campy pulleys, will this effect its performance? The suntour pulley is also a bit rough, so I went ahead and ordered the $5 eBay pulleys. Thanks for that link! I don’t know if the diameter of the shimano ones is also larger, but, they are new so at least they will spin freely. And for $5 I’m okay if they don’t work, I’m sure I’ll need them someday.

thanks again everyone!!

iab

10 tooth is a larger diameter than 9. The larger diameter makes it less prone to breaking,

The Golden Boy 

I think the red anodized aluminum pulleys look really slick on older derailleurs.

SurferRosa

I should get a commission.

chico81 

Do you accept PayPal?

ThermionicScott 

10T pulleys will increase the RD capacity very slightly, a good thing IMO.

verktyg 

In the mid 70's I discovered that Suntour pulleys transmitted more chain vibration into the pedals than Campy pulleys of that era. Shimano too but to a lesser extent.

What I found was that Campy NR pulleys had smooth rounded edges on their teeth. Notice the seam line or, the beginning of a crack in this NOS mid 70's Campy pulley.



Mid 70's Suntour pulleys were wider at the tops of the teeth and didn't fit into the chain as smoothly. Also the plastic was much harder than on Campy pulleys and it took much longer to wear in and smooth out the vibrations.



NOS 1975 era Shimano Crane pulleys. The teeth had chisel edges at the tops but sharp corners. The plastic was hard too like Suntour and took a while for the corners to wear down.



Simplex pulleys had rounded edges and quickly wore in. These Pulleys were used in Simplex Criterium derailleurs until the early bike boom days. They have adjustable ball bearings.



Now to @golden boy ['s] comment about red aluminum pulleys, in 1975 I switched from Campy NR derailleurs to first generation Suntour Cyclone derailleurs.

Maybe I'm and example of the "Princess And The Pea" but the Cyclone pulley noise and vibrations were bothering me so I tried a set on Bullseye Sealed Bearing Pulleys.

It had NOTHING to do with the pseudo engineering BS about lower friction and so on. I figured that alloy chainrings smoothed out the feel over steel ones so maybe alloy pulleys would do the same thing.

I was right. After about 20 miles the corners wore off and the pulleys smoothed out. They run quieter too.

I still have red Bullseye Pulleys on several bikes plus a spare set that I pulled out of a worn out Cyclone RD.



When I installed these pulleys the chain was running rough so I had to file a little chisel edge on the tops of the teeth because I was running an SRAM PC48 6-7-8 speed chain rather than a wider 5 speed chain these pulleys were made for (what price glory).



I've replaced the grease in Bullseys pulleys several times. It's easiest if they are removed from the derailleur. I used a dental pick tool to gently remove the rubber seals then flushed out the old grease with solvent. Repacked them with Phil grease and voilà...

verktyg

cantom

Hello. This forum is incredibly useful!

Does anyone have an up to date ebay listing for the Shimano jockey wheels that fit right up perfectly on a Nuovo Record derailleur?

Much appreciated!