SRAM X-Sync 2 Steel 12 Speed Direct Mount Chainring - 3mm Boost - Round - Black - 34TSRAM X SYNC2 Steel Chainrings. X SYNC 2 Eagle is the next evolution of SRAM X SYNC technology. The aggressive teeth design provides better chain retention for a smoother, more efficient pedal feel. With a focus on long wear life, the X SYNC Eagle design reduces friction and the accumulation of mud, grit and grime. Specs: Weight: 110g (32t), 96g (30t), 133g (28t DM) Material: Steel Finish: Black Compatibility Compatible with all SRAM 1x Direct Mount