Shimano Dura Ace 7900 10 Speed Oe Cassette

This is a super lightweight, 10 speed, OE cassette, that is suitable for Super Narrow 10-speed HG chains, and has an 11 to 23 tooth range.
It has 4 Titanium and 1 Steel sprocket, mounted on a lightweight alloy carrier, to reduce weight and increase rigidity, without sacrificing strength.
It also has Hyperglide sprockets, that provide excellent shifting, even under the most demanding gear changes, and close ratio gearing, for more efficient use of energy through finer cadence control.
The sprockets are also extensively cut away and drilled to further reduce weight, without reducing rigidity, and have a Nickel-plated finish for hard wearing resistance to corrosion.
It has an Alloy cassette lockring.