Micro SHIFT Sword 1x Crankset You Have My Sword. And My Bow. And My Axe When it comes to simplicity, nothing beats a 1x drivetrain. Without a front derailleur, you can just focus on shifting the rear. The Micro SHIFT Sword 1x Crankset has a single, chain-retaining ring mounted to the crankset's outer ring position and pairs perfectly with the rest of the Sword 1x drivetrain. It features a wide design optimized for 50mm chainlines, a 24mm spindle that is compatible with Shimano bottom brackets and is easily convertible from 2x to 1x. Features24mm spindle that is compatible with Shimano bottom brackets Wide design optimized for 50mm chainlines Easy conversion from 2x to 1x1x chain-retaining ring works well with clutch derailleurs SPECIFICATIONSSpeeds10-Speed BB Compatibility Shimano Bottom Brackets Chain Ring42T, 40TCrank Arm Length165, 170, 172. 5, 175mm BB Spindle Interface24mm Spindle Chainring Material Aluminum Bolt Center Diameter (BCD)110mm Crank Arm Material Aluminum Chainline50mm Bottom Bracket Included No Intended Use Gravel Weight810g (172. 5mm) | Microshift | Sword 1X Crankset 175Mm, 10Mm | Aluminum