The SRAM PG-1050 10sp Road Cassette provides the ultimate in strength and precise, accurate shifting. Boasting a wide range of gears for efficient ascending and descending, it also has two chainrings for faster shifting and set up. With a durable heat-treated steel construction, the top three sprockets are on a carrier for improved rigidity. - L.M. Features: PG-1050 10sp Road Cassette from SRAM Wide range of gears for efficient ascending and descending 2 chainrings for faster shifting and setup Heat-treated steel construction Top 3 sprockets are on a carrier for improved rigidity Forged 7000 Series Alloy lockring Weight: 299g Please Note: Compatible with a medium/long cage (apex) rear derailleur only.