Originally Posted by
cny-bikeman
Be aware that the 11 or 12 tooth cogs on a 10-11 cog cassette will be almost useless with a 53-39. Flat out too high with the 53 and high wear with the 39.
He didn't mention changing the cassette from his current 9-speed and already has 53/39 chainrings on the 9-speed (FC-7700 I expect) crank. This is just a cosmetic crank upgrade.
I agree on the uselessness of an 11T cog or even a 12T with a 53T chainring for most riders. However the prevalence of those cogs was well established in the 9-speed era so 10 and 11-speed didn't make it any worse.