Campagnolo 12 speed cassette compatibility

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deano802
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Joined: Sun May 26, 2019 9:10 pm

by deano802

I am not fully versed in campag and I am thinking of building something up with chorus 12sp, but would want to be able to put it on my saris H3 trainer.

If I am understanding this correctly I can buy a XD/XDR adapter for the H3, put a Sram 12 sp cassette on that, and should be able to run chorus 12 sp gruppo/chain etc.??

I am not that bothered about perfect shifting as I generally use erg, but would would still need it to shift occasionally.

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Limerick23
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by Limerick23

I put my SR bike on my saris h3 that has Shimano 11. Runs smooth, you can change gears kind of okay. But if it's to be in one gear it's fine. Shifting is possible only missing a few cogs. I got the kickr bike now so goodbye saris.

bm0p700f
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by bm0p700f

Thats 11 speed. There is no comaptibility between sram 12 speed cassettes and campag 12 speed.

morrisond
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by morrisond

Has anyone tried SRAM 10-26 with Campy 12 Derailleurs?

DaveS
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by DaveS

I've used a force axs 10-36 with a Campy 12 drivetrain and it worked great.

jackie
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by jackie

DaveS wrote:
Sat Dec 19, 2020 5:51 pm
I've used a force axs 10-36 with a Campy 12 drivetrain and it worked great.
did you hve to do anyting to the campy rear dee?

DaveS
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Joined: Fri Mar 24, 2006 1:26 pm

by DaveS

No RD mods needed to use the axs cassette with Campy.

dsjackson
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Joined: Sat Jan 02, 2021 9:12 pm

by dsjackson

DaveS wrote:
Sun Dec 27, 2020 3:46 pm
No RD mods needed to use the axs cassette with Campy.
Hey DaveS,

Greatly appreciate all your contributions to this thread. Do you think the SRAM 10-36 cassette compatibility with Campy 12 is limited to EPS setups or does it also work well with mechanical Campy 12?

Thanks!
Daniel

DaveS
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by DaveS

I tested the sram 10-36 with chorus mechanical 12 speed.

andy4g63
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by andy4g63

I actually saw this last weekend, a person I know running 12 speed Campy EPS and a Sram Axs cassette and Sram Axs flattop road chain.

He said it works great with Campy...

All else is Campagnllo on the bike, even the wheels

andy4g63
Posts: 50
Joined: Wed Mar 18, 2020 7:02 pm

by andy4g63

I actually saw this last weekend, a person I know running 12 speed Campy EPS and a Sram Axs cassette and Sram Axs flattop road chain.

He said it works great with Campy...

All else is Campagnllo on the bike, even the wheels

RuiTerrinha
Posts: 4
Joined: Thu Jan 04, 2018 11:43 am

by RuiTerrinha

fehguy wrote:
Tue Sep 03, 2019 2:03 am
Hi folks,
I scoured the Internet looking for information on this but came up empty. I'm a long-time Campagnolo fan (been riding it ever since I could afford it) and would like to continue being so. Sadly, compatibility with Campagnolo has been an after-thought for most 3rd party parts providers. I also am a #1 Chris King fan and would like to keep riding their hubs. The challenge I faced is that newer, 142x10mm through axles are no longer available for Campagnolo cassette free hub bodies. So lies the challenge...

SRAM makes nice parts. They don't have the cache or soul of Campagnolo but it's hard to argue against how revolutionary their 12-speed AXS group is. My question was, could a 12-speed SRAM AXS cassette work with a Campagnolo 12-speed EPS Super Record group?

I spent way too much time searching around for an answer to this. Possibly because the Campy loyalists would never run a SRAM cassette, or possibly because people just don't mix-and-match like they used to. The only way to get a clear answer was to measure.

I got a hold of a SRAM 10-28 XDR cassette and a Campagnolo 11-32 Super Record cassette. I went into this very skeptical about them working together, mostly because you'll read everywhere that "Campagnolo squeezed 12 gears into the space of 11 for hub compatibility". That sounded a lot like a much more narrow spacing than any of the other 12 speed groups.

Well, taking a look at a super record cassette in person, it's a bunch of hooey. The largest cog hangs over past the end of the cassette by 0.070"! They don't fit in the same space, the 12 speed Campy just pushes the last cog over the spokes a bit.

IMG_1085.jpg

There's a nice "chain catcher" on the largest cog, which can help keep the chain from wedging into the spokes on an overshift. The rest of the cassette is evolutionary Campagnolo. Two groups of 3 cogs with the same size spacer between the loose gears. It's very nicely made and definitely is a more thoughtful design than the older 11 speed varieties.

IMG_1088.jpg

The SRAM is a leap forward. I do believe the XDR cassette body is a better design, and it allows for a 10-tooth gear. The attachment mechanism is smart--the cassette body transfers load throughout the whole two-piece unit, keeping the gears from digging into the sides of the aluminum freehub body. It may not be as beautifully machined, but it is a (sadly to me) better design. I really wish the whole industry would embrace the XDR free hub body as a standard.

IMG_1089.jpg

Now for measurements... I took some calipers and measured (in inches, sorry!) the cassette total width, spacing, overhang, and cog width.

The Campagnolo measures 1.610" from outside-to-outside of the cogs. Each cog is about 0.057" thick with 0.080" of spacing between them (the "about" is because of the machined profile). The 11-tooth cog--like the 11 speed versions--will "fit into" the 12-tooth cog slightly.

The SRAM measures 1.631" from outside-to-outside, so it is a hair wider than the Campagnolo. The cogs are slightly wider at 0.070 for the 28-tooth aluminum gear to 0.062 for the steel ones. The spacing between cogs is also uniform.

IMG_1089.jpg

Conclusion? We're looking at a 0.021" delta over the width of 12 cogs, or about 0.5mm. I think this is within the tolerance of bicycle components and that the standard EPS adjustments will make it work. Parts are on order and I'll report back.

IMG_1086.jpg

It's worth noting that the difference in total width between the two is much less than the difference in total width between Campagnolo 11 speed and Shimano 11 speed.

Photos below, I hope this is helpful to someone!
I think i understood that the SRAM XDR 10-32 cassette will work on a campa EPS 12 speed body? can you confirm this please?

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itsacarr
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by itsacarr

I currently use an XDR cassette on my trainer for EPS 12.

Butcher
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by Butcher

I think I posted this elsewhere but I purchased a Sunshine cassette for my trainer. 12 speeds, 11-28, cheap, and works for a Shimano freehub. The top 4 are alloy which will not be that great for longevity, but for $40ish, I hope it's good enough.

Image

AliExpress.

by Weenie


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RuiTerrinha
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Joined: Thu Jan 04, 2018 11:43 am

by RuiTerrinha

itsacarr wrote:
Fri Dec 24, 2021 2:24 pm
I currently use an XDR cassette on my trainer for EPS 12.
thank you, but that was not my question.

I have a pair of wheels with campagnolo 12speed body, and I am wondering if I could fit a SRAM XDR cassette on this wheels.

Thank you

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