The 105 5800 series crank borrows it's design from the race proven Dura Ace 9000 group. The biggest changes in this newest generation of Hollowtech II cranks are the move to 11-speed and a new chainring bolt pattern.
105-5800 cranks use Shimano''s new 110mm 4-bolt chainrings which allow them to create a stiff chainrings in a wide range of sizes without the need for multiple crank bolt patterns. So if you need race gearing on Saturday but want to attack the hills during the week you can just change the chainrings and not the whole crank.
- HOLLOWTECH II Crankset (2x11-speed)
- Optimum power transfer. New reinforced chainring construction to keep balance between weight and rigidity.