Shimano Dura-Ace R9100 39t 110mm 11-Speed Chainring for 39/53t MFPN=0 721 418 } An extremely nice looking

} An extremely nice looking full aluminum headset top cap made in one piece

you don't really need more specs for this

model SMC Core rails CrMo top microfiber color black/gray size S/M weight 405g

2-piston XC brake system offers high performance brake control with reduced input force at the finger tips

Shimano Dura-Ace R9100 39t 110mm 11-Speed Chainring for 39/53t MFPN=0 721 418 } An extremely nice lookingShimano Dura Ace R9100 39t 110mm 11 Speed Chainring for 39 53t. This Shimano chainring allows you to update your Dura Ace FC R9100 11 speed crankset with a chainring configuration to best fit your riding style. Integrates Shimano Hollowglide Technology: the high rigidity hollow structure cuts down on weight yet maintains strength to provide better power transfer and quicker more precise front shifting Features a weight saving 4 bolt design with a BCD