40T

 Reliable, light and darn good looking Designed for all Shimano 5 bolt cranks like Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750 and many more Compatibility: Shimano Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750, Tiagra 4650, FSA, Rotor 3D & 3D+, S-works and many older cranks. Fits Sram Force and Red, Also fits Sram cranks that have 1 hidden chainring bolt like Force22, Red22 Oval chainrings have been shown to improve traction and reduce leg fatigue Narrow/Wide tooth...

 FSA`s rendition of the Narrow/Wide chainring for 1x10/11 drivetrains Features longer teeth and diamond shaped alternating profile to keep constant chain contact Longer tooth profile helps to reduce noise and quickly shed mud High grade anodized AL7075/T6 construction 110mm 5-bolt 40T 7075AL Black 10/11sp Narrow/Wide

 Narrow/Wide tooth design for chain retention on 1x systems 10, 11, or 12 speed compatible Mud clearing channels CNC AL7075 Swiss Alloy 110mm 5-bolt 40T 1x 7075AL Black 10/11sp Narrow/Wide

 Narrow/Wide tooth design for chain retention on 1x systems 10, 11, or 12 speed compatible Mud clearing channels CNC AL7075 Swiss Alloy 110mm 5-bolt 40T 1x 7075AL SRAM hidden bolt compatible Black 10/11sp Narrow/Wide

 Narrow/Wide tooth design for chain retention on 1x systems Oval shape for increased power and efficiency 10, 11, or 12 speed compatible Mud clearing channels CNC AL7075 Swiss Alloy 110mm 5-bolt 40T 1x 7075AL SRAM hidden bolt compatible Black 10/11sp Narrow/Wide

 Narrow/Wide tooth design for chain retention on 1x systems Oval shape for increased power and efficiency 10, 11, or 12 speed compatible Mud clearing channels CNC AL7075 Swiss Alloy 110mm 5-bolt 40T 1x 7075AL Black 10/11sp Narrow/Wide

 110mm BCD 5-bolt chainrings for Road, Cross, and Gravel applications Narrow/Wide tooth design for chain retention on 1x systems 10 or 11 speed compatible Forged and hard anodized AL6061-T6 alloy construction 110mm 5-Bolt 40T 1x AL6061 Black 10/11s Narrow/Wide

 Genuine SRAM single chainring Optimized for 1x drivetrain without the need for a chain guide CNC machined X-Sync technology 110mm 5-bolt 40T 1x Grey 11sp Narrow/Wide