If this plan is for a 2x chainring setup, there is a potential issue. A few years ago on one of my road bikes, I went to a 54/38 chainring setup (from a 52/42). I quickly discovered that when on the (inner) small chainring, and the two or three (outer) smallest gears, that the bigger chainring interfered with the angle of the chain back to those small gears. The bike was still rideable…just couldn’t use those smaller/outer gears when on the small/inner chainring. The interference was just slight, but enough for the large ring to snag the chain. Then I figured that if I added a small spacer(s) between the two chainrings…just a washer on all the chainring bolts…that it created enough clearance. But THEN I discovered that the space between the rings was wider than the chain, and occasionally it would fall in that gap when shifting, resulting in no drive, and I’d have to stop and correct that mess. Eventually I went back to the 42 inner chainring because I got tired of dealing with it. I suppose the problem could have also been eliminated with a BB that had a longer drive side spindle. — Dan