FSA SL-K Super Road Inner 39T Chainring: Replacement precision CNC machined chainrings for either Shimano or Campagnolo systems. Precision CNC machined A7075/T6 Shifting ramps & stainless steel pins for outer & middle rings Black anodised with CNC details Colour graphics & laser etched logos Available in Shimano 10 speed (N10), or Campagnolo 11 speed (C11) 39T = 130mm BCD