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13/29 Cassette(6 posts)

13/29 CassettesteveF
Apr 16, 2001 3:50 PM
I presently have a Campy Record 12/25 cassette. I am considering changing to a 13/29 so that I can spin more on steep uphills. I realize that the 13/29 will require a longer chain and different derailleur, and will weigh a little more. Could this change ever be worth the $400 or so price?! Any other benefits, drawbacks or things to consider? Thanks!
re: 13/29 CassetteCliff Oates
Apr 16, 2001 4:42 PM
You will probably need to add links to your chain, but I'd hold off on the new derailler until you've demonstrated to yourself that the current one won't work. I suspect you'll be unable to do so. So...that knocks the cost down to $140 (Excel) for the cassette and a new chain.

In terms of benefits, that depends a lot on where you live. If you need a 35" gear (39/29), this approach is a nice, light alternative to a triple. I live in the SF Bay Area and that 29t cog saw some use last weekend when I was climbing over Mt. Hamilton. It'll get used again tomorrow evening on the wall at the top of Mt. Diablo. It sure is nice to have this gear if you're someplace where you need it.
re: 13/29 CassettesteveF
Apr 18, 2001 5:31 PM
The Campy website/FAQ says that the medium cage derailleur is needed for the 13/29 cassette, that the standard derailleur won't work properly. Do you believe them or are they looking to sell more parts?
re: 13/29 CassetteCliff Oates
Apr 20, 2001 6:43 AM
Campy says all sorts of things that the wrenches discover are a load of whooey. The rec.bicycles.tech newsgroup is an excellent source for this sort of knowledge as there are several shop owners who are knowledgable about Campy that regularly post their observations and recommendations there. Their experience has indicated that the regular cage derailleur will work just fine with this cassette, and I am inclined to believe more strongly in their experience over a marketing document.
re: 13/29 CassettesteveF
Apr 20, 2001 7:42 PM
Thanks so much, Cliff, for the reply and info. I trust that you just saved me $220 or more!!
You have the answerKerry Irons
Apr 16, 2001 4:49 PM
And you're the only one who can answer it. It comes down to how stressed you are in climbing those steep hills now, whether you feel you're getting stronger as a climber, and whether you feel your knees are at risk from the gear you have now. Your current 41 inch gear would drop to a 35, nearly a 14% increase in cadence at the same speed. If you're currently turning 60 rpm while climbing, your new cadence would be 68. 70 rpm would go up to 80. You have to decide whether it's worth it.