This Praxis Girder has never been ridden or used it was a brand new take off that also includes the M30-BB86/BB90/BB92/DH 104.5/DH 107 bottom bracket! BB Compatibility: BB86/BB90/BB92/DH 104.5/DH 107 CRANK / USE Girder : Trail / XC MATERIAL: Carbon Arms | Alloy M30 spindle (30mm/28mm) CHAINRING Any brand 3-Bolt Direct Mount ring can be used for SRAM & SHIMANO Compatibility The chainring type and offset determines compatibility with any given MTN bike drivetrain. Q-Factor 178mm MAIN BOLt: 8mm Alloy Main crank bolt for Install/Self-Extract B.B: This crank requires the Praxis M30 BB (which is included with this listing) TECHNOLOGY: In-House Carbon "RTM+Filimant Winding" mfg, WAVE TECH POWER OPTIONS Aftermarket MTN Power Meters for this crank : Power2Max – NG and the NG Eco 3-Bolt Power Meter SRM – 3-Bolt Power Meter SRM – Power Pedals GARMIN – Rally Power Pedals MTN CHAINLINE 0mm Offset Ring = 55mm CL 3mm Offset Ring = 52mm CL "Boost" 6mm Offset Ring = 49mm CL "Non-Boost" NOTE: Updated 3-bolt DM ring interface to align spacing with established chain-line offsets. Riders can use any brand 3-Bolt DM ring. See Pic - On the backside of the G2 CADET drive side arm you’ll see a sticker showing offset options to get your desired chain line.