Nuovo Record Rear Derailleur with Roadlink?
I have a Nuovo Record rear derailleur from a 1973 bike that I am restoring. Velobase shows that its max cog and chain wrap sizes are both 26T. What can I expect the max sizes to be if the derailleur is used with a Roadlink? Thanks in advance!
"http://www.velobase.com/ViewComponent.aspx?ID=D8DE34D4-C66F-4C8A-AF5B-0EF99D40F702&Enum=108&AbsPos=62" |
I am running mine on 28T cogs on 2 bikes without issue. Not sure about the roadlink but as a short cage derailleur you are going to be constrained by the chain wrap. Even if you can fit a 32 in the back unless you're running a very close ratio chainring setup your chain capacity just wont be taken up.
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Not to increase capacity, but I've been wondering for a while if one could use a NR with a Roadlink, filed down to allow the RD to pivot forward with the parallelogram more horizontal to make the geometry more Crane-esque.... would it word and would it improve performance?
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Seek out a Campag Rally # 3450 .
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I've used a Pat 72 NR with a 32T cog. That was with NR 52/42 up front. Big/big was super iffy, but everything else was fine. Depends on the chain length, position in the dropouts, and of course the length of the hanger. I've got one of those road link hangers but haven't tried it yet.
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Originally Posted by Lascauxcaveman
(Post 21583544)
I've used a Pat 72 NR with a 32T cog. That was with NR 52/42 up front. Big/big was super iffy, but everything else was fine. Depends on the chain length, position in the dropouts, and of course the length of the hanger. I've got one of those road link hangers but haven't tried it yet.
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Originally Posted by sced
(Post 21583769)
How many speeds?
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I'm wondering if a NR RD + Roadlink + 7sp 14-32 will work
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Originally Posted by sced
(Post 21583939)
I'm wondering if a NR RD + Roadlink + 7sp 14-32 will work
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Super Record Cages on a Nuovo Record derailleur will shift 28T with ease.
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Originally Posted by Lascauxcaveman
(Post 21584330)
Maybe. What's the chainset up front look like? How confident at determining chain length are you? How much leeway do you have on your drop outs?
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Originally Posted by fietsbob
(Post 21583531)
Seek out a Campag Rally # 3450 .
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Originally Posted by tiger1964
(Post 21584822)
This AM's eBay asking prices on a Rally are $200 to $450, ouch.
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Regular NR and with horizontal dropouts can handle 14-32t Ultra-6 using 48-42 chainrings. All shifts are good and everything looks PROPER. Axle position is critical.
The Road Link is going to increase the chain gap over the smaller cogs and not in a good way, especially using modern, flexible chains. Swinging the NR forward to mimic the Crane won't work very well because of the absence of the dropped knuckle (you will lose the ability to clear such a large cog as it swings forward). The Rally with dropped knuckle was made for the job to accommodate a wider gearing range. |
Originally Posted by sced
(Post 21584661)
42/52 rings, good at links, Campy horizontal dropouts. - I am willing and able to give it a try, but am wondering if anyone has done this successfully. I could go 30 max at back or a different RD.
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I was stoked to get a 14/28 freewheel working on my 1972 ItalVega for last years Eroica California event. With a pat 72 NR dereailleur and 52/41 front rings everything is happy. I showed Wes who at the time was helping with the event and he told me 32 is possible if you remove the axel stop screws and pull the wheel as far back as you can. I have not tried it but I am tempted as I live on a hill and am now running 28's on a couple of my bikes. The other bike running a 28 just got switched to a patent 82 Super Record and it works perfectly , big to big , no problem.
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Originally Posted by Kabuki12
(Post 21585155)
I was stoked to get a 14/28 freewheel working on my 1972 ItalVega for last years Eroica California event. With a pat 72 NR dereailleur and 52/41 front rings everything is happy. I showed Wes who at the time was helping with the event and he told me 32 is possible if you remove the axel stop screws and pull the wheel as far back as you can. I have not tried it but I am tempted as I live on a hill and am now running 28's on a couple of my bikes. The other bike running a 28 just got switched to a patent 82 Super Record and it works perfectly , big to big , no problem.
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Just go Shimano Deore/XT/XTR and close your eyes when shifting.
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Originally Posted by dddd
(Post 21584920)
Swinging the NR forward to mimic the Crane won't work very well because of the absence of the dropped knuckle.
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If you were to grind the stop on a RoadLink that far, I don't think that there would be any metal left to act as a stop.
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I had a Pat. 78 shifting on a Shimano 7-speed 28 without breaking a sweat. I'm sure 30 would have worked, maybe 32 with positive vibes...
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Originally Posted by tiger1964
(Post 21584822)
This AM's eBay asking prices on a Rally are $200 to $450, ouch.
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Originally Posted by sced
(Post 21583433)
I have a Nuovo Record rear derailleur from a 1973 bike that I am restoring. Velobase shows that its max cog and chain wrap sizes are both 26T. What can I expect the max sizes to be if the derailleur is used with a Roadlink? Thanks in advance!
Originally Posted by dddd
(Post 21584920)
Swinging the NR forward to mimic the Crane won't work very well because of the absence of the dropped knuckle
Originally Posted by tiger1964
(Post 21586959)
Hmm, wouldn't the RoadLink emulate a dropped knuckle, if ground down to permit the rotation?
Originally Posted by dddd
(Post 21587314)
If you were to grind the stop on a RoadLink that far, I don't think that there would be any metal left to act as a stop.
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i'm going to attempt an '83 super record RD with 16-30 regina 5 speed with 42/52 out front, so when my frame gets back from groodys in a few weeks i'll see wazzup i have a roadlink on hand, but i think by tweeking the chain length i can make it work sans link.
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Originally Posted by cocoabeachcrab
(Post 22789810)
i have a roadlink on hand, but i think by tweeking the chain length i can make it work sans link.
BTW, if chain tension is good, who cares if the RD's parallelogram tilts far forward? On most drop-parallelogram RDs, the lower pivot is pretty far forward anyway, right? More chain wrap is a plus -- no? |
I was taught BITD that the 'ideal' chain length makes the rear derailleur's pulley wheels vertical in both lowest gear (largest freewheel cog, inner chainring) as well as the highest gear (smallest cog, outer chainring).
I typically use a 54" chain, and I get the preceding vertical pulley alignment in top gear when using a Campy Nuovo Record rear derailleur. Using this chain chain length and pulley alignment, I usually can't use a big freewheel cog larger than 22T. However, if you shorten the chain (by typically 1"), the altered rotation of the pulley plates increases the clearance between the upper pulley and the lower edge of the freewheel cogs. You can then use a larger freewheel. And, you can pull the rear wheel further back in the frame and gain some additional clearance as well. My vintage Pinarello catalog shows factory bikes set up with the shorter chain length, so the bottom pulley is forward of vertical when in the smallest freewheel cog and large chainring combination. Campy Super Record pulley plates have the same spacing between the pulleys as NR, but the SR's pivot point (where it attaches to the pivot bolt) is about 1cm higher, so the pulleys are lowered by 1cm. With a NR derailleur using SR pulley plates and the same 54" chain, I can then shift into a 28T cog without fuss, and I don't have to pull the wheel further back in the dropout. However, the SR plates similarly increase the clearance to the smallest cogs. Also, the plates are thinner and I thus believe they are more flexible. With SR pulley plates, I find that shifting into a cog smaller than 14T is unreliable. I've usually had to shift to the small chainring, shift down to the 13T cog, and then upshift back on to the large chainring. I've not used the Wolf Tooth derailleur extension tab. Instead, I bought (on eBay) a cheap copy of the Wolf Tooth derailleur extension tab because I wanted a silver tab instead of black. On the extension tab which I used, the tab didn't have good alignment on the rear dropout; it was rotated too forward. This caused the NR derailleur to have bad alignment and incorrect clearance to the freewheel; the derailleur body too horizontal and the drive train setup originally didn't work. To resolve the problem, my framebuilder friend made a stepped-down metal pin. He drilled the tab and then pressed in the pin. The new pin altered the tab alignment to near vertical. Using the modified derailleur extension tab with the original NR pulley plates then provided good shifting on to the 28T and also gave no hangup when shifting down to the 13T cog when on the large chainring. I've read of others who successfully used it and they recommended it highly. They were able to use the Wolf Tooth extension tab because they could change the tab's alignment and tighten down the tab very tightly to keep it in place on the dropout, without needing the stop pin which I used on mine. Again, I have no experience with the Wolf Tooth extension tab. By using the modified extension tab and the 54" chain, I figure I could probably shift into a 30T. https://cimg8.ibsrv.net/gimg/bikefor...9bd8632d6f.jpg 34x28 lowest gear. 49T large chainring, 54" chain. As-used chainstay length = 42.6cm https://cimg5.ibsrv.net/gimg/bikefor...d5e99a62ea.jpg Modified extension tab. The pressed in pin makes the tab alignment closer to vertical when installed on the dropout. |
https://cimg3.ibsrv.net/gimg/bikefor...994817526.jpeg
Left to Right: Campy Rally, Campy Post-78 Super Record, Campy pre-78 Super Record, and Zeus post-76 2000. |
Great input! As i assemble the drivetrain, I'll keep an eye on this. I do not have machine tools or the pin idea would be great; it actually occurred to me to jam some JB Weld in there... sloppy solution but perhaps it would work in conjunction with really tightening the bolt?
Part of me wonders if using the RoadLink plus the long cage is overkill. 13T-32T freewheel, right now the (Campy Record) chainrings are 43T/52T but I am considering 41T/47T.
Originally Posted by Andrew_G
(Post 22790054)
I was taught BITD that the 'ideal' chain length makes the rear derailleur's pulley wheels vertical in both lowest gear (largest freewheel cog, inner chainring) as well as the highest gear (smallest cog, outer chainring). I typically use a 54" chain, and I get the preceding vertical pulley alignment in top gear when using a Campy Nuovo Record rear derailleur. Using this chain chain length and pulley alignment, I usually can't use a big freewheel cog larger than 22T. However, if you shorten the chain (by typically 1"), the altered rotation of the pulley plates increases the clearance between the upper pulley and the lower edge of the freewheel cogs. You can then use a larger freewheel. And, you can pull the rear wheel further back in the frame and gain some additional clearance as well. My vintage Pinarello catalog shows factory bikes set up with the shorter chain length, so the bottom pulley is forward of vertical when in the smallest freewheel cog and large chainring combination.
Campy Super Record pulley plates have the same spacing between the pulleys as NR, but the SR's pivot point (where it attaches to the pivot bolt) is about 1cm higher, so the pulleys are lowered by 1cm. With a NR derailleur using SR pulley plates and the same 54" chain, I can then shift into a 28T cog without fuss, and I don't have to pull the wheel further back in the dropout. However, the SR plates similarly increase the clearance to the smallest cogs. Also, the plates are thinner and I thus believe they are more flexible. With SR pulley plates, I find that shifting into a cog smaller than 14T is unreliable. I've usually had to shift to the small chainring, shift down to the 13T cog, and then upshift back on to the large chainring. I've not used the Wolf Tooth derailleur extension tab. Instead, I bought (on eBay) a cheap copy of the Wolf Tooth derailleur extension tab because I wanted a silver tab instead of black. On the extension tab which I used, the tab didn't have good alignment on the rear dropout; it was rotated too forward. This caused the NR derailleur to have bad alignment and incorrect clearance to the freewheel; the derailleur body too horizontal and the drive train setup originally didn't work. To resolve the problem, my framebuilder friend made a stepped-down metal pin. He drilled the tab and then pressed in the pin. The new pin altered the tab alignment to near vertical. Using the modified derailleur extension tab with the original NR pulley plates then provided good shifting on to the 28T and also gave no hangup when shifting down to the 13T cog when on the large chainring. I've read of others who successfully used it and they recommended it highly. They were able to use the Wolf Tooth extension tab because they could change the tab's alignment and tighten down the tab very tightly to keep it in place on the dropout, without needing the stop pin which I used on mine. Again, I have no experience with the Wolf Tooth extension tab. By using the modified extension tab and the 54" chain, I figure I could probably shift into a 30T. |
I have the NR with Soma long cage on one bike and it has no problem with a 13-32 freewheel. Doubt you’ll need anything else.
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