3-pin BCD variations
04-14-11 | 07:53 PM
#1
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 2,470
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From: Minneapolis
Bikes: -1973 Motobecane Mirage -197? Velosolex L'Etoile -'71 Raleigh Super Course
3-pin BCD variations
So I yanked a set of Stronglight TSs off a Peugeot Corse last week and cleaned them up. Of course they look good and of course the inner chainring's sharktoothed. One of the other mechs had the Campy 3-pin crans right there in hand and I compared BCDs; they match, which is nice. Poking around on eBay I find that Nervar used 2 different BCDs, 120 and 122. Not a whole lot of information around on what rings interchange with 3-pin.
Any specialists out there with some ability to shed light on the situation? Are there any cool old Williams rings out there that might fit?
thanks,
Blight
Any specialists out there with some ability to shed light on the situation? Are there any cool old Williams rings out there that might fit?
thanks,
Blight
04-14-11 | 08:26 PM
#2
vintage motor
Joined: Sep 2008
Posts: 1,786
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From: Tepic, Nayarit, Mexico
Bikes: 48 Automoto, 49 Stallard, 50 Rotrax, 62 Jack Taylor, 67 Atala, 68 Lejeune, 72-74-75 Motobecanes, 73 RIH, 71 Zieleman, 74 Raleigh, 78 Windsor, 83 Messina (Villata), 84 Brazzo (Losa), 85 Davidson, 90 Diamondback, 92 Kestrel
Check the Campy-Stronglight fit, I read somewhere (here) that they are just different enough to be incompatible.
04-14-11 | 10:13 PM
#3
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Joined: Aug 2010
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In searching for a 40-42T 3 pin chainring for a campy gran sport, i found this thread:
https://www.bikeforums.net/showthread...pin+chainrings
please let me know if you find a 116 BCD ring that you don't need
good luck with your project
https://www.bikeforums.net/showthread...pin+chainrings
please let me know if you find a 116 BCD ring that you don't need
good luck with your project
04-16-11 | 07:48 AM
#5
multimodal commuter
Joined: Nov 2006
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From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
04-16-11 | 10:12 AM
#6
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 2,470
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From: Minneapolis
Bikes: -1973 Motobecane Mirage -197? Velosolex L'Etoile -'71 Raleigh Super Course
BRILLIANT!!
Thank you so much. Will put out my needs on the local vintage-bike-parts network, and if I hit the Mother Lode, I will certainly share.
Thank you so much. Will put out my needs on the local vintage-bike-parts network, and if I hit the Mother Lode, I will certainly share.
