SRAM PG-1170 11S Cassette

SRAM builds the PG-1170 with steel cogs throughout most of the range, then mounts the larger climbing gears to an aluminum spider. This construction approach keeps weight reasonable while maintaining durability where it matters most—the smaller cogs where you're generating peak power and spending significant time. The steel-to-aluminum transition happens seamlessly because SRAM machines the shifting profiles consistently across both materials.