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too funny ... hab ich auch gerade gelesen:Kann ich auch nicht genau beantworten. Die Maße sind marginal unterschiedlich. Im englischsprachigen Forum (weightweenies) hat jemand eine 12-fach SRAM Kassette mit campa 12-fach erfolgreich kombiniert.
"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.
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.
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.
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.
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.
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!"
dieser beitrag ist aus weight weenies:
https://weightweenies.starbike.com/forum/viewtopic.php?t=158450
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