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Will a Campy Chorus 48-32 chainring fit on a Record crankset?

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Will a Campy Chorus 48-32 chainring fit on a Record crankset?

Old 02-18-24, 07:56 PM
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Will a Campy Chorus 48-32 chainring fit on a Record crankset?

Hello, and thanks for input!

My main ride has Campy Chorus 2x12 with 48-32 rings and 11-34 cassette, rim brakes. This combo gives me a sub 1:1 granny gear (which I want, living in Colorado).

There's a new build coming along and I'm considering going with Record (rim brakes) for (a) the cachet factor, (b) the brakes, and (c) and shifters--not necessarily in that order :-)

One of my options is to buy Chorus grupo with Record brake hardware. This is the lower cost alternative and I don't get the Record FD and RD but maybe I don't care (?).

Another is to buy Record groupset but replace Record chainring with the Chorus 48-32 CR if the Chorus CR fits the Record crankset. Then I get all the Record goodness and along with the sub 1:1 granny.

Insights are appreciated!

Last edited by eljayski; 02-18-24 at 08:00 PM.
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Old 02-18-24, 08:15 PM
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I would double check the BCD (Bolt Circle Diameter or sometimes PitchCD) but I think for 12 speed it is the same. They look the same at least and I would imagine knowing the top 3 campy groups somewhat that generally it is all interchangeable pretty much but I am not an expert.
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Old 02-18-24, 08:59 PM
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mechanics forum will get you all the info you need.
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Old 02-18-24, 11:04 PM
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It won't work. Record uses a traditional style pair of chainrings, albeit with an odd spacing, to fit the standard style record spider. Chorus has the large ring bolt to the crank spider while the small ring bolts to threaded tabs that are a part of the large chainring. So to make things more difficult chorus has two totally different bolt circle diameters for the two chorus rings. However, 11sp chorus uses a completely different design and might be compatible. I currently run a pair of record levers/brakes and the rest chorus, it all works just fine in that regard.
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Old 02-19-24, 11:37 AM
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Originally Posted by eljayski
Hello, and thanks for input!

My main ride has Campy Chorus 2x12 with 48-32 rings and 11-34 cassette, rim brakes. This combo gives me a sub 1:1 granny gear (which I want, living in Colorado).

There's a new build coming along and I'm considering going with Record (rim brakes) for (a) the cachet factor, (b) the brakes, and (c) and shifters--not necessarily in that order :-)

One of my options is to buy Chorus grupo with Record brake hardware. This is the lower cost alternative and I don't get the Record FD and RD but maybe I don't care (?).

Another is to buy Record groupset but replace Record chainring with the Chorus 48-32 CR if the Chorus CR fits the Record crankset. Then I get all the Record goodness and along with the sub 1:1 granny.

Insights are appreciated!
AFAIK the Record and Chorus 12sp cranks use the same 4-bolt pattern - can't be sure about SR - the crank arms look a little different
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Old 02-19-24, 05:21 PM
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According to the QBP product description:

Record 2x12 50/34 speed uses 112/146 BCD
Chorus 12 speed 48/32 uses 96 BCD
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Old 02-19-24, 10:39 PM
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Originally Posted by eljayski
Hello, and thanks for input!

My main ride has Campy Chorus 2x12 with 48-32 rings and 11-34 cassette, rim brakes. This combo gives me a sub 1:1 granny gear (which I want, living in Colorado).

There's a new build coming along and I'm considering going with Record (rim brakes) for (a) the cachet factor, (b) the brakes, and (c) and shifters--not necessarily in that order :-)

One of my options is to buy Chorus grupo with Record brake hardware. This is the lower cost alternative and I don't get the Record FD and RD but maybe I don't care (?).

Another is to buy Record groupset but replace Record chainring with the Chorus 48-32 CR if the Chorus CR fits the Record crankset. Then I get all the Record goodness and along with the sub 1:1 granny.

Insights are appreciated!
rereading this question, Iím a little mystified - why would you swap an individual chainring? Is there some retailer that will allow you to swap individual rings on a new crankset? Or are you talking about buying a record groupset and swapping in a cheaper chorus 48/32 crankset? This would give you the gearing you want while still giving you record RD, shifters and brakes, and save you money (record cranksets are $$$). If this is what youíre contemplating, than yes, a chorus 48/32 crankset will work seamlessly with an otherwise record groupset
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