SRAM X7 10 Speed (2x 10) BB30 Chainset: Strong & light OCT hollow forged crank arms with optimised AL7050 crank arms delivering high-performance strength & power transfer. Speed: 10 X-Glide 2X10 shifting technology, 39-26, 42-28 gearing GXP Bottom Bracket featuring Gutter Seal Technology Available in the following bottom bracket configurations: PF30, BB30, GXP & GXP PF Brushed crank arm texture & Storm Grey finish