The sram pg 1170 11 speed cassette produces fantastically high shifting performances on a consistent basis featuring a new design to create an overall quieter unit that is reliable as ever featuring a semi spidered design the sram cassette is light weight strong and incredibly efficient with the 16 tooth cog adding even greater power into the shifting action you can expect instant and accurate shifting at all times with the sram pg 1170 11 speed cassette sram pg 1170 11 speed cass