Originally Posted by
SalsaMTB
The reason I ask this is I don't know your experience level, so I apologize if this seems very basic, but there is a significant difference in feel of shifting to a harder gear with left shifter vs. right shifter. You said it feels like you have to hold the left shifter until it shifts, which I'm not exactly sure what that means, but I do know I have to push my left shifter much further to get into the big chain ring, than I ever push my right. When you use your left shifter to go into your big chainring, the chain has a lot more distance to travel so you have to push the shifter further, takes more effort, and is a bit slower.