Originally Posted by
hhk25
What DeadGrandpa said - you lose the FD, cables and shifter. Simplifies the setup. I guess you get some weight savings too. I'm never going to use the high gear off road although I might regret the loss of climbing capability when fully loaded.
For the contrarian view.
1x is great if you are doing solo rides and/or are not concerned about cadence.
2x is great if you are doing fast group rides when you really need to be in the right gear for the right cadence. Makes it harder to get dropped on the uphills and on the downhills.
You may be different, but for me:
1x complicates the setup - as I'm really gonna end up changing chainrings for the type of ride I'm doing
1x was a heavier option on my bike (those big cassets aren't the lightest).