Shimano Ultegra R8000 39t 110mm 11-Speed Chainring for 39/53t MFPN=RTA-12-172-1.5 And what really defines Topo

And what really defines Topo is the use of durable Fibra-tek with debossed topographic map of Vermont's Kingdom Trails

- Performance and reliability

Square taper

Steel axles

Head: ABS-1 Pro

Shimano Ultegra R8000 39t 110mm 11-Speed Chainring for 39/53t MFPN=RTA-12-172-1.5 And what really defines TopoThis Shimano chainring allows you to update your Ultegra FC R8000 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 of 110 mm Ring Position Type Inner Tooth Count 39 Drivetrain