FSA Super 386 MTB Inner Chainring: Genuine replacement chainring made from precision CNC machined A7075/T6. Precision CNC machined A7075/T6 Shifting ramps & stainless steel pins for outer & middle rings Black anodised with CNC details Laser etched logos Available in Shimano 9 speed (S9), Shimano 10 speed (M10) or SRAM 10 speed (X10) BCD: 86mm