DESC: Truvativ X9 10-Speed crankset not only includes a smooth GXP bottom bracket, it's outfitted with tough, quick-shifting rings and lightweight crank arms for solid trail performance. Hollow-forged 7075 aluminum arms deliver lightweight, stiff performance for excellent power transfer and durability. 44/33/22 chainrings are optimized for quick, clean shifts. Includes GXP external bottom bracket cups, which have a revamped sealing system that enhances bearing protection for smooth-spinning longevity.