My brain swears I read something about this somewhere (Maybe "Art of Urban Cycling"? Returned my borrowed copy...) I'm not so certain, and I need help settling the question between my brain and I.
I've got a Bianchi Castro Valley that is set up (stock) as a 1x9 . Bianchi's site says the crankset is a Sugino XD500t with 42 teeth (which I gather to be a 74/110 ring on a tandem crank). Bianchi also says my cassette is a SRAM 11/26t, but Sheldon's gear calculator only has a SRAM 12/26 9-speed which made me look once, and I believe I found that to be correct, not the Bianchi stats (a typo?). [I'm at work & forgot to check this a.m. before I came in.]
Anyhow, the question is this: I wanna fiddle with the gearing a bit (slightly high for my liking), and I know that swapping the chainring is the easier and cheaper way to try this quickly, but do I have to swap chainrings with a specific increment in teeth different from what I have already? In other words, can I use a 39 tooth ring with the same cassette, or should I only change the chainring in 2 tooth increments or something?
My brain is insisting that I saw something about wearing out chains faster with odd combinations, or is that only if I've got no deraileur taking up slack?