My touring bike has a DualDrive 3x9 with SRAM DualDrive, single 46T 110mm Suginu chainring, ERTO 406 Kojak wheels and SRAM pc951 chain. This results in a gear inch range of 19.6” to 106”.
I would to move down the range by changing the chainring from 46T to 40T. I found on Amazon several 40T 110mm chainrings but am not sure which will be the best fit my bike and what are the differences between them, quality wise:
Any suggestion? Will any 40T 110mm chainring fit my bike? Does the quality of the chainring matter (I don’t have FD if it makes a difference) or are they all the same?
Also, how much should I shorten the chain when going from 46T to 40T?