SHIMANO 105 FC-5800 Crankset 53X39T - Black

Now with a 4-arm Hollowtech II design passed down from Ultegra and Dura-Ace, the Shimano 105 FC-5800 53/39T 11-Speed Crankset achieves the perfect balance of lightweight rigidity and power transfer. It's lighter and more unyielding than its previous 5-arm design and features reinforced construction around the chainring area for an even better stiffness-to-weight ratio. Asymmetric 4-bolt pattern is the same for both compact and standard chainrings, so one crankarm fits all chainrings sizes. The chainrings are also interchangeable with Ultegra and Dura-Ace for even more versatility.
FEATURES
Hollowtech II design has an optimum balance of lightweight and stiffness for better power transfer and acceleration
New gear dimensions enhance overall performance
Improved gearing for less chain touch in small/small combination
Reinforced construction around the chainring area further improves stiffness-to-weight ratio
Hyperdrive SG-X chainrings for super smooth front shifting and special tooth profiles, pick-up spikes and ramps help make the front derailleur shifts quiet, easy and trouble-free
Asymmetric 4-bolt pattern allows standard and compact chainrings to be run on the same crankarm
Rings are interchangeable between 105, Ultegra and Dura-Ace
DUAL-SIS compatible
Bottom bracket not included
Compatible with Shimano Ultegra SM-BBR60 Bottom Bracket and Shimano Ultegra SM-BB72-41B PressFit Bottom Bracket
Compatible with Shimano 11-speed