Shimano 105 CS-5800 Bicycle Chain and Cassette - 11 Speed - 12/25

High performance HG-EV 11-speed 105 Road cassette

Hyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load

Close ratio gearing allows a more efficient use of energy through finer cadence control

Largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity

Sprockets are cut away and drilled to further reduce weight without reducing rigidity

Nickel-plated finish offers hard wearing resistance to corrosion

Pearl-bright steel cassette lockring

For Super Narrow 11-speed HG-X chains

Super narrow lightweight 11-speed HG-EV symmetrical design chain for smooth shifts and maximum durability

Outer plate design has been developed to reduce the chance of chain suck

Sil-Tec surface treatment technology (PTFE plating) on inner links that is smooth running and increases durability

The inner plate has been developed for better contact with gears providing smoother shifting under high load, giving efficient pedalling, increased rigidity and near silent running

5.62 mm chain width, optimised for 11-speed Super Narrow HG-EV drivetrains

Average weight 257 grams

For more information on how to keep your bike running smoothly, click here to see PBK's expert advice on taking care of your chains and cassettes.