Following the well-received introductions of its Dura-Ace and Ultegra 11-speed series component and wheel lines, Shimano introduces its new mechanical 105 5800 series components that also deliver the most lauded features of the new premium 11-speed groups: ultra light action shifting and powerful braking. Designed to inspire riders of all levels, the all-new 105 5800 component group brings top-level performance to the widest range of riders, giving advanced functions, smooth operation and comfortable ergonomics.
The new 105 has an 11-speed drivetrain and adopted some key features from Dura-Ace and Ultegra. The 105 has that same light action and defined click engagement like Dura-Ace and Ultegra. Partly because of the polymer coated cables and partly because of the redesigned derailleurs and shift levers. This clearly shows Shimano’s philosophy of system engineering. All parts are individually designed to work together as one groupset.
Shimano’s 11-speed 5800 components deliver the lightest and easiest front shifting Shimano has ever made. With a compact new comfortable lever design borrowed from Dura-Ace and Ultegra, ST-5800 offers light action, shorter stroke response shifts that any rider will appreciate.
The RD-5800 series rear derailleur uses a new spring balance and cable pitch for light shift operation and improved derailleur geometries also provide robust adjustability. Two 5800 series rear derailleur options are offered, SS for riders using 28T or smaller cassettes and GS for wider 32T compatibility.