Sram xx1 chainring srams new xx1 group is packed with the latest technology in order to fine tune your shifting under any and all conditions the new xx1 group has been designed to be run as a 1x11 drivetrain and will provide lightning fast shifts and flawless chain management each tooth on the chainring has been precisely machined to integrate with both the inner and outer links of the chain perfectly the x sync fits the single universal spider allowing to change the chainrings without havin