Sram's entry level 10spd cassette borrows it''s semi spiderless construction from the ultra light weight OG-1090 and XX cassettes but with less machining and a spider for the 3 largest cogs.
Semi-spidered construction with durable, blast/heat-treated steel cogs and weight reduction ports throughout the range (three largest cogs fixed to spider)
PowerGlide tooth profiling designed for smooth/fast shifting performance.
Fits 8/9/10sp* SRAM/Shimano-spline freehub bodies for 10-speed shifting/spacing *(does not fit DuraAce 10sp aluminum freehub bodies or hubs using Shimano deep spline free hub body design. )
Includes black steel lockring
Sram Apex and Rival medium cage derailleurs will also work with the 11-32 mountain geared PG-1050 for a gear range that closer resembles a traditional triple.
The 12-36 version requires a long cage rear derailleur.