The sram pg970 9 speed cassette uses powerglide ii technology which ensures a smoother and easier action optimised for off roading more reliable more durable and better performing thanks to an optimal tooth profile and shift ramp design for quick and positive index shifting go climb a mountain with the fantastic sram pg970 with its dependable steel body satin chrome finish and light weight just 330g for 11 32 this mountain bike cassette delivers the same reliable performance