Nervar and TA Chainwheel Interchangeability
11-04-05, 02:03 PM
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The answer to this question may be common knowledge, but is the bolt pattern to attach the outer chainwheel to crank the same on TA, Nervar and Stronglight cranks? I just picked up a Nervar like the one in the picture and I was wondering if I could use TA chainwheels on it. I’m not currently in possession of a TA outer chainwheel, so I can’t check it out.
11-04-05, 02:30 PM
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Yes, I think those old school inner-circle 5-bolt patterns all use the same BCD. At full-size BCDs, however, Stronglight (122mm), Nervar (128mm), and TA (various) are all different. However, if you're handy with a dremel motor, you can pretty easily adapt standard 130mm chainrings for use on Nervar arms by elongating every bolt hole by 1mm toward the crank spindle.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
11-05-05, 09:08 AM
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Originally Posted by John E
Yes, I think those old school inner-circle 5-bolt patterns all use the same BCD. At full-size BCDs, however, Stronglight (122mm), Nervar (128mm), and TA (various) are all different. However, if you're handy with a dremel motor, you can pretty easily adapt standard 130mm chainrings for use on Nervar arms by elongating every bolt hole by 1mm toward the crank spindle.
I figured they were a matching bolt pattern. Have you tried that dremel technique on the 130 chain ring?
11-05-05, 04:10 PM
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Originally Posted by Noah Scape
I figured they were a matching bolt pattern. Have you tried that dremel technique on the 130 chain ring?
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
11-06-05, 09:20 AM
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I am converting (maybe) a Bottecchia road bike to Single speed (using the small chainring) I *might* have an outer ring available if I decide to not keep it
would have to compare it to your pic
would have to compare it to your pic
