Campy 12-30 w/older 10 speed mid-cage?

[MilanoTom]

I've got a hilly charity ride coming up in about a month, and I want to buy a new cassette. I'm running an early mid-cage Record 10 speed rear with a Record CT 48/34 in the front. When the derailleur was manufactured, there was no such thing as a 12-30 cassette, only the 13-29. According to the specs, the max cog size for the derailleur is 29, the minimum cog is 13 (I've successfully run a 12-27, however) and the max capacity is 30, so I'd be above capacity by two teeth and running a max cog that's one tooth too big.

Does anybody know for sure (as in having done it) whether or not a 12-30 will work with this derailleur? Am I better off with the old standby 13-29 (even though it's only available in the low-end galvanized Veloce)?

Thanks in advance,
Tom

[AngryScientist]

that'll be fine. a mid cage campy RD will never know the difference between a 29 and 30T. unless you were really at the limit, you shoudnt need to change chain length either.

[cgolvin]

I’m running a 12-30 cassette with a mid cage Chorus 10 RD and it works very well. However, I have 50/34 on the front so can’t speak specifically to your configuration.

[MilanoTom]

I’m running a 12-30 cassette with a mid cage Chorus 10 RD and it works very well. However, I have 50/34 on the front so can’t speak specifically to your configuration.

Thanks - it should be no problem at all then.

Tom

[voir dire]

I’m running a 12-30 cassette with a mid cage Chorus 10 RD and it works very well. However, I have 50/34 on the front so can’t speak specifically to your configuration.

I too use this combination: 12-30 / medium 10 rd / 50-34 (not 48-34) with no issues.

[cinema]

running it on a 10s short cage with standard cranks... 53 ring doesn't like the last two cogs but otherwise fine. i make sure not to cross, but on accident, it can handle it, just loud. i have the b screw adjusted all the way out. it's all about wrap. on a compact it should be totally fine.

[ERK55]

I too use this combination: 12-30 / medium 10 rd / 50-34 (not 48-34) with no issues.

I’m running this same setup-works great.

[Stainomo]

I use 12-30 + 48/34 without any problems! 2006 chorus medium cage derailleur.

[Nomadmax]

I run 34/50 12-30 ten speed with medium cage Record on several bikes. No problem at all as others have said.

[MilanoTom]

Thanks for your input - it's very much appreciated!

Tom

[oldpotatoe]

As long as the chain length is 'proper', plug and play. The fact that you have a smallish big ring makes it even easier.