SRAM PG-1050 10-Speed Cassette Shifting Up The cassette on your bike directly affects your ability to climb and sprint. With the right cassette, you'll be able to conquer any ride. The SRAM PG-1050 10-Speed Cassette is made from a forged alloy spider that holds the largest cog. The heat-treated steel cogs make them resistant to wear. The cassette is locked down with a steel lock ring. The forged alloy spider holds the largest cogs Heat-treated steel cogs add a layer of durability Steel lock ring keeps your cassette in place | Sram | Pg-1050 10 Speed Cassette 11-36T