Tooth Count: 32T (Inner Ring). -Bolt Circle Diameter (BCD): 110mm FSA ABS (Asymmetric Bolt Spacing) 4-bolt pattern. -Compatibility: Designed for N10/N11 drivetrains, compatible with FSA, SRAM, and Shimano 10 and 11-speed systems. -Crank Compatibility: Specifically designed for FSA Gossamer -ABS cranks; it may not fit K-Force or SL-K cranksets. -Material: Precision CNC machined AL7075/T6 Aluminum. Color: Black.