Shimano claris 2450 octalink compact cranksetgreat value chainset from the claris 2400 range durable and low maintenance quality give you more relax time 8 speed drivetrain provides on optimal range of gears for on road riding please note bottom bracket is not included features sg x chainrings feature strategically placed chain pick up pins and tooth profiles to ensure fast and positive shifting octalink spindle fit bottom bracket for increased rigidity compatible with 8 speed hyperglide hg