Chorus 11-34

[Basso69]

Does anyone know, why a Chorus 11-34 cassette is not compatible with my super record 12 speed. Front chainring is 52-36. ( Campagnolo website) states 11-34 only compatible with chorus.

[sjbraun]

11-32 works with my 11 speed SR long cage RD. Seems like a 34 might be possible.

[dddd]

It's been the same with Shimano, as Ultegra goes to 34t and Dura-Ace only goes to 30t.

Sometimes it's the case that only one cage length is offered for the top gruppo, being that it is ostensibly intended/marketed for super-fit professional riders.

[sales guy]

Campy is now offering a Record 12 and SR 12 rear derailleur that will fit a 11x34th Campy cassette. And they offer a larger pulley to make older R12/SR12 rear derailleurs 11x34th compatible.

They are available right now.

[Dave]

It does require a longer cage (72.5mm). It's listed as a spare part now. I assume that the earlier models RDs have the 25mm extension bracket, like the new Chorus 12. That provides additional clearance. It also requires 1/2 inch more chain, so it might require a longer chain.

There's also chance that the older RD might work, but it depends on the frame's hanger dimensions and the chainstay length.

If you can wrap the big/big with a 32 and seem to have additional chain length, it might work.

[oldpotatoe]

Does anyone know, why a Chorus 11-34 cassette is not compatible with my super record 12 speed. Front chainring is 52-36. ( Campagnolo website) states 11-34 only compatible with chorus.

As has been mentioned, it 'may'..depends on your frame BUT..yup, longer cage, now offered by Campag, new pulleys, etc...Depending on what(any) product website says, a lot of what they say 'won't work', does in the wild.

[Plum Hill]

Side question: why are they stuck on an 11 small cog?
Give me a 13. If all I’m using the 11 for is going downhill, I can coast or lazy pedal.

[oldpotatoe]

Side question: why are they stuck on an 11 small cog?
Give me a 13. If all I’m using the 11 for is going downhill, I can coast or lazy pedal.

I think because the 'trend' to compact and sub compact cranks..and some 1by stuff..they still think 'racy-bike' so gotta have something like that 53/12 of yesteryear..I think a 13-34 is a GREAT idea. A 48/13 still a YUGE gear..for that GRoad bike.

13-14-15-16-17-18-19-21-23-26-30-34...or something..straight thru 19 AND get that 16 and 18, which is used most of the time.

[Dave]

Side question: why are they stuck on an 11 small cog?
Give me a 13. If all I’m using the 11 for is going downhill, I can coast or lazy pedal.

My solution was to get the new 48/32 crank, so the 48/11 is close to a 52/12. It's the smallest top gear ratio you can get with 12 speed.

With 12 speed, even starting with a 12 would results in too many 1T shifts. The 11-29 is a straight block up to the 17, and so are the 11-32 and 11-34 cassettes.

The most common complaint I've read is the desire for an 18T by flat land riders. They might get an 11-27 someday, if enough complaints are received.