..would this work? - mixing Sora and Apex?

deswahriff
deswahriff Posts: 310
edited November 2011 in Workshop
..I'v been running my Sora equipped Orbea Aqua for 15 months now, looking to upgrade but don't want to change the bike, as I've got it spot on comfort-wise and to be honest, don't want a big spend.
So I'm considering a partial (well, minimal!) groupset upgrade and having heard good stuff about SRAM Apex, I'm considering just changing the shifters, the cassette, rear mech, and chain, of course.
My question is, will the exisiting Sora chainset and front mech work ok with all this? I understand 10 speed chains are narrower than 9 speed, so does this make it a non-starter, or do chainsets have a degree of tolerance?

Thanks very much for any input.