Originally Posted by Mo'Phat
You can safely run up to a 27 with a shortcage derrailleur. I've actually run 28...but you do need to really dial in the pulley adjuster screw-thingie.
My only advice is to forget what gear you think you should be in, and just ride. You'll get used to it. You'll find yourself staying in the 50 more.
That's exactly what I do...and it's causing me my problems. I end up in cross chaining heaven. I can't seem to be able to use the 50X23 for sure, and possibly the 50X21. Means that I end up having to dump to the 34 for no reason - the 50X21 and 50X23 would have worked.
