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Top swing derailleur and Tooth count
My cyclocross bike has braze ons for mounting a top swing derailleur. Currently I have no derailleur. Does any one know where I can get one that goes up to 50 Teeth on the front chain ring or what models are capapble of this? It looks like they only make them for Mountain bikes that go up to 44 teeth. I imagine that the curvature of the deraillure would prevent it from being set up correctly for a larger ring. Or will it just work the same anyway. I plan on running a bar con in friction mode. Thanks...
I'm not too sure about models of top-swing deraillers, but I'm using a LX derailler with a 52-tooth biopace ring. Its not ideal, but it works.
Unique Vintage Steel
I'm fairly certain it has more to do with the position of the derailleur rather than the design of it. Most braze-ons I've seen have an adjustment range of a cm or two up and down to allow for different sized larget front chain rings. For what it's worth, you can probably pick up a braze-on top swing 105 FD on ebay or elsewhere for around $15.
Your right--I'd forgotten that shimano makes top-swing road deraillers. Follow this link--any lbs should be able to order it for you:
Originally Posted by cuda2k