SRAM 30t 94 BCD x 4-Bolt 11/12-Speed X-Sync2 Eagle Chainring, BlackSRAM X SYNC 2 Eagle 1x chainrings provide a high level of performance and durability. The aggressive tooth design provides better chain retention for a smoother, more efficient pedal feel. With a focus on long wear life, the design reduces friction and the accumulation of mud, grit and grime. Specifications: Tooth Count: 30 Ring Position Type: Chain Retaining Single Ring Drivetrain Speeds: 11 Chainring BCD: 94 Color: Black Defined Color: Black