Shimano 105 5800 11 Speed Road Groupset

This Shimano 105 5800 11-Speed Groupset has successfully narrowed the gap between 105 and Ultegra.

Whilst both groupsets undeniably benefit from the joys of trickle down technology of the elder statesman Dura-Ace, the performance of Shimano's 105 11-speed groupset is precise, efficient, and reliable.

Crisp, Light, and Stiff Every facet of Shimano's 105 groupset has been updated from earlier models to deliver an accurate, crisp, and stiff performance. Lower weight, and now featuring an 11-speed drivetrain, this Shimano 105 groupset opens the door of pro-level technology to part-time racing enthusiasts and recreational cyclists who enjoy clean, crisp, and accurate shifting each time they change gear. Featuring excellent durability, this groupset will keep you shifting for thousands of miles.

5800 Crankset: The new 5800 Crankset features a new four-arm Hollowtech II design similar to that of the current Ultegra and Dura-Ace.

The new chainset is stiffer and lighter than the five-arm design it replaces and Shimano have reinforced construction around the chainring area to further improve the stiffness-to-weight ratio.105 FC-5800 Chainset 53.39t or 50.34t Crank Arm Length: 172.5mm HOLLOWTECH II design: optimum balance of lightweight and stiffness New gear dimension for great improvements Improved gear for less chain touch in small/small combination Hyperdrive SG-X-chainrings DUAL-SIS-compatible Includes Press Fit Bottom Bracket Dual Control Shifters Set STI 105 ST-5800: Shimano 105 now gains the light and responsive shift action found in Dura-Ace and Ultegra Levers, with a new compact shape that's been borrowed from the levers of Shimano's more expensive groupsets. The lever can also be adjusted to accommodate different hand sizes.

Ergonomic design Powerful and controllable braking system Durable105 Rear Derailleur RD-5800 SS: Shimano has included a new spring mechanism and cable pitch in the new 105 rear derailleur in order to provide robust adjustability.

Short Cage Crisp shifting Precise alignment105 Front Derailleur FD-5800 Braze On: The new 105 front derailleur has a longer link arm and a new spring mechanism compared with the last generation component.

Braze On Crisp shifting Accurate alignment Easily adjusted105 Brakeset BR-5800: The new 105 brakes feature a new symmetrical dual pivot caliper design, with a higher arch allowing clearance for up to a 28mm wide tyre.

This results in a 10% increase in power.

105 Cassette CS-5800: The new 105 11 Speed Cassette uses close ratios that Shimano say optimise rhythm and cadence control.11.28t Broad range to cope with most terrain Durable CN-HG600 11-Speed Chain: The new CN-HG600 11-Speed Chain uses Shimano's low friction surface treatment known as SIL-TEC. The new chain's PTFE surface coating reduces friction whilst boosting durability.

The technology first debuted on Shimano's flagship Dura-Ace 9000 Chain a couple of years ago.116 Links Reduced friction Please note that this groupset does not come supplied with outer cables.