FSA Energy Chainring 39T 90BCD 4-bolt 11-speed MFPN=F9975 Can be bolted directly to

Can be bolted directly to an existing post permanent structure or to the THP-1 Post (available separately)

Smartphone/tablet connectivity via E-TUBE PROJECT

and KICKR CORE and now come standard on these and newer versions

Surly Stainless 5-bolt ChainringsNo ramps or shift gates

}microSHIFT Right Thumb Shifter 11-Speed Mountain SRAM Compatible

FSA Energy Chainring 39T 90BCD 4-bolt 11-speed MFPN=F9975 Can be bolted directly toFSA Energy Chainring 39T 90BCD 4 bolt 11 speed. Full Speed Aheads Energy Modular Direct Mount Chainrings are designed for 2x road and gravel cranksets and feature shifting ramps and stainless steel pins on outer rings. Precision CNC machined AL7075 T6 Shifting ramps and stainless steel pins on outer rings Black anodized finish Laser etched logo Compatible with Modular cranksets