I am a SS 29'r kind of guy, but on my geared bikes I rarely if ever ride in the 11T sprocket. I find it 'stiff' and slow because my leg speed gets slowed so much. I like the 12T cog though! So I am thinking of bailing on all the mountain cassettes I own and going 12-27. I know I will miss the 32-28 every now and again, but I am very used to standing and suffering from all the SS riding I do. Anyone else thinking this? My favorite cassette of all time was my 12-28.