The CS-5800 is the suitable cassette for new 105 11-speed group.
The 11-speed cassette provides small gear steps that optimize rhythm and cadence control. The chain is treated with Shimano’s SIL-TEC coating to run smoother and wear longer in all conditions.
HG-EV cassette sprocket is for rider-tuned gear combination & cadence management. We provide optimal 11-speed drive train gear ratio; you can choice wider and closer gear combination available to match various riding disciplines. HG-EV cassette sprocket is obtained 11-speed gear without compromising the 10-speed durability and improved HYPERGLIDE shifting.