KCNC 10 Speed Titanium Cassette, Shimano

Detail
KCNC 10 speed cassette for Shimano. 2 piece construction. The 8 largest cogs are mounted to a one piece 7075 aluminum carrier and the 2 smallestcogs are machined from a single piece of titanium. This means there are no sharp edges on the cassette to cut into aluminum freehub bodies. As light and lighter than most aluminum cassettes but more durable and with a longer life span.