Close shouldn't be a problem, because it minimizes torsion on the cage. I take the "clear a penny" approach when adjusting height of my FD - a penny resting against the large ring should clear the cage all the way around. From this photo, https://www.flickr.com/photos/stonehog/14746522120/in/set-72157646102516140/ it looks like the cracks had been growing for a long time. Did you move it from another bike? If you don't need a triple. the smaller opening of a road double is going to make for a stronger cage.
On Saturday, August 16, 2014 3:10:19 AM UTC-5, stonehog wrote: > > In 30+ years of riding, I've never had problems with front derailleurs. > Now in the last year, I've had 2 break on me during "normal" riding. The > first was a Shimano CX70 on a brevet last summer. I had some problems with > the cage bending out due to chainsuck on that guy, so I wasn't too > surprised. > > The other day on my commute home, I popped the cage on a Campy Centaur > triple. It was a similar break at the top of the cage with a clean edge > break. It doesn't feel like I'm hard on the shifting, but something must > be up. Both breaks have been on my AHH with a Rene Herse 44x28 crankset. > I adjust the derailleurs to be close to the top of the big ring with 1-2mm > spacing as spec'd. No problem with another CX70 on my Hunqapillar and > XD600 48x34 double. Similar mileage, and if anything, more abuse. > > Here are some pics: > https://www.flickr.com/photos/stonehog/sets/72157646102516140/ > > Any suggestions? Do they just "not make 'em like they used to"? > > Brian Hanson > Seattle, WA > On Saturday, August 16, 2014 3:10:19 AM UTC-5, stonehog wrote: > > In 30+ years of riding, I've never had problems with front derailleurs. > Now in the last year, I've had 2 break on me during "normal" riding. The > first was a Shimano CX70 on a brevet last summer. I had some problems with > the cage bending out due to chainsuck on that guy, so I wasn't too > surprised. > > The other day on my commute home, I popped the cage on a Campy Centaur > triple. It was a similar break at the top of the cage with a clean edge > break. It doesn't feel like I'm hard on the shifting, but something must > be up. Both breaks have been on my AHH with a Rene Herse 44x28 crankset. > I adjust the derailleurs to be close to the top of the big ring with 1-2mm > spacing as spec'd. No problem with another CX70 on my Hunqapillar and > XD600 48x34 double. Similar mileage, and if anything, more abuse. > > Here are some pics: > https://www.flickr.com/photos/stonehog/sets/72157646102516140/ > > Any suggestions? Do they just "not make 'em like they used to"? > > Brian Hanson > Seattle, WA > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
