This has got to be the best all-around gear combo for flats, at least for solo riding. Otoh finding cassettes that have a 16T on them is much harder than it should be. In the 9 speed world my choices are 13x23, 13x25, and 14x27. To get a reasonable, climbing-friendly 13x27 I have to get a 12x27, a 16T middle cog, and a 13T final cog. I looked at 10 speed figuring that that's the cog they've added but nope! Anyone else really like the 16T in the back but have a hard time finding the right cassette?