Originally Posted by
70sSanO
I don’t understand why a narrow-wide on a gravel bike. Worst case would be a chain guide. By design narrow wide is only found on even tooth chainrings, alternating teeth, so it is not possible to even make a 39t narrow-wide. Seems like a lot of work that is probably set to fail just for a specific 1x chainring.
I’d just get a narrow 39t 135bcd and run a chain guide if I were that concerned. It is a gravel bike after all.
John
Good point about odd numbers. Why didn't I realize that?
For your other point, I don't think you have any idea what terrain I ride. I have a narrow-wide, chainguide, and Shadow plus derailleur. They're all needed.
Fast washboards are so much worse than big hits for throwing the chain. I'm not going casual rides.