Just got a new bike and it came with X9 in 2×10 guise…full X9 and seems to work fine. No idea of cost for replacement parts but unless I need to replace the shifters it looks like I’m tied to SRAM (which is a shame as I prefer Shimano) – saying that, the bike cost me very little so I’m certainly not complaining in the slightest!
Front mech appears to be ok and I hadn’t thought of cost for replacement rings but hopefully when they do wear out, Middleburn hardcote jobs will be available.
The front mech is well clear of any flying stuff so I suspect it’ll last well enough – it has a huge carbon body over the top and front of it so I’m not expecting any issues with it (well hoping for troublefree performance). I think I’m going to shorten the chain…I much prefer shorter cage mechs but this is less likely in a 2×10 setup, so I’ll get the chain as short as I possible can and see how it goes…given it’s on a 6″ travel full sus, I suspect I won’t be able to run the chain quite as short as I could, but as long as it isn’t necessarily long then that should do.