Originally Posted by
HazeT
I always thought the rule was to never shift under load... I guess that only applies to shimano and specially SRAM front derailleurs.
Newer Shimano (105 5800) seems to do just fine shifting under load up front going from small to big. Going the other way is asking for a dropped chain so I never do that. Hopefully Chorus is nearly as good as Shimano as that will do just fine.
I have been successfully shifting the rear under load since my first Sora-equipped bike. If it is a 'rule' disobeying it has never hurt anything on my bikes.