Sram pg850 8 speed cassette if youre a rider who needs to run an 8 speed drivetrain the pg 850 is a great choice for light weight strength and quick shifting the powerglide ii 8 speed cassette gives you reliable performance day in and day out the race proven design and durable chrome plated finish help ensure years of hassle free performance gear ratios 11 26 12 26 12 23 recommended chain sram pc 850 recommended group pc 68 pc 58 pc 48 size 280g 11 26t colour silver