Im thinking about drivetrain on my new BFe build. Originally was thinking i only had enough cash to pull over existing saint bb/chainset and 8 speed cassette, alivio shifters/mechs.

Now thinking it would be a good time to upgrade and ill just swallow the cost! I will likely match the new shifters and mechs, get a 10sp chain and cassette, but what about front chainrings? How do I know compatibility of front chainrings with my existing crankset?