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8 speed Campagnolo crank with 9 speed drivetrain?

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8 speed Campagnolo crank with 9 speed drivetrain?

Old 12-04-22, 10:00 PM
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J_Climacus
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8 speed Campagnolo crank with 9 speed drivetrain?

I'm shocked this hasn't been asked already but every forum I was able to find was about 10 or 11 speed.

I am building a bike around a pair of 1998 9 speed campagnolo record ergopower brake/shift levers. They only made these shifters in silver for one year, so that is the immovable piece of the equation. I will be pairing a 9 speed rear derailleur and cassette.

I've been looking for a crankset for this build, but I'm having difficulty telling the difference between 8 and 9 speed campy record cranksets. They look identical to me. Moreover, there are good options available for record 8 speed cranks. So if they *are* identical or at least compatible it would save me a lot of hassle.

So I'm wondering, if I buy a crank that turns out to be from 8 speed era, will it work with a 9s setup as long as the chainring gearing is within the accepted range of the front derailleur I buy?

One thing that may be relevant is that I know that shortly after 1998 (either 99 or 2000, not positive which) campy made some changes to the rear derailleurs and cassettes and maybe also the brifters. I think it was something about the way the cassette is grooved but I've had a hard time confirming. I believe these changes would be irrelevant for the crank, but thought worth mentioning just in case.
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Old 12-04-22, 10:56 PM
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Mike V3
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Any Campagnolo crank will work with any group. Just use the like chain with the cassette.Front derailleur is like a ratchet. Works with anything.
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Old 12-05-22, 12:46 AM
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Andrew_G
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Here's Campagnolo's web page for documentation: https://www.campagnolo.com/US/en/Sup...#documentation

Under documentation, there's a separate section for spare part catalogs: https://www.campagnolo.com/US/en/Support/download?td=3


If you go to spare parts web page 3, you can find catalogs for your era(s) of parts: https://www.campagnolo.com/US/en/Support/download?td=3


Having said that... I've previously downloaded the Campy spare parts catalogs from 1994 - 2022. The 1994 Record crankset was a C-Record style item, for 8 speed. I recall that it used a 111mm BB axle. In 1995 Campy changed the crank arms and simultaneously changed to the shorter 102mm axle, also for 8 speed.

In 1997, Campy introduced 9 speed. In 2000, they introduced 10 speed.


I also checked the Campy chainring part numbers from 1994 - 2000. The chainring part numbers remained the same for 8 speed and 9 speed. So, I expect that you won't have any compatibility issues with using a 9 speed chain on an 8 speed crankset.


In 2000, separate chainrings were added in 2000 for 10 speed. Campy tightened up the spacing between the chainrings. I believe this was done to prevent shifting and chain drop problems. I also believe that they also thinned the chainrings to accommodate the more narrow inside spacing of the 10 speed chain.


I'm currently using 10 speed chainrings with my 9 speed drivetrain. I particularly like the Specialities TA 'Vento' chainrings. I read on a UK web bike shop (I forget which one) that the TA chainrings have a better tooth profile, which reduces chain suck caused by chainring wear.


I do believe that the TA chainrings are an excellent product for less money: I developed chain suck on an original Campy chainring at a sooner-than-I-expected time. That chain suck cost me about $100 to have my right chainstay resprayed to eliminate the gouges in the paint.
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Old 12-05-22, 06:04 AM
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heidelbergensis
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Beautiful set of shifters you have there! Definitely worth building a bike around. I've recently been experimenting with blending different generations of Campy components, and I can say from experience that you will not have an issue unless you try mixing chains and shifters and derailleurs with different indexings. But even that isn't final. For example: the pull ratio for 10/11sp is identical, and I'm currently using a long cage 11sp Athena RD with 10sp Record DT shifters and 10sp chain, and the set up works flawlessly. Previous to that build I was using 8sp Record with an alloy 10sp Centaur Ultratorque crankset with 10sp rings and a NOS 9sp Campy chain I found on eBay. That build, too, worked impeccably. Having had both, I'm also fairly certain there is no functional difference between the five-arm square-taper 8/9sp cranksets. Now, if you were trying to run a 5/6/7 speed crank/ring combo with newer indexed gearing and narrower chain, you might have an issue, but I have seen someone mix a C-Record crankset with 11sp Athena. Conversely, if you were to try and use, say, a wider 8sp chain with the narrower clearances on a 9sp group, you would absolutely have issues. So, barring the above, I think you should be good using an 8sp crank/ring combo with 9sp gearing. Just mind your chain selection. You could even get away with using a more contemporary 10sp chain like KMC's ultra-light X10SL, especially if you switch out the chainrings for 9/10sp. But even there, I think there is no issue with the tooth spacing of the chainring or the internal width of the chain, the biggest issue is with spacing and intercog clearances on the cassette.

Last edited by heidelbergensis; 12-05-22 at 06:26 AM.
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Old 12-05-22, 12:09 PM
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Thank you, all! This is helpful. I snagged the 8s crank and will try to remember to report back confirming it works so that future folks with the same question aren't left hanging.
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