Designed for SRAM's X-SYNC™2 chainrings, the NX Eagle DUB crankset is engineered for complete chain control. Each tooth's profile is precisely engineered to work quietly, efficiently, and securely with the Eagle™ chain's inner and outer links. DUB™ technology features a better-engineered bottom bracket and a new spindle design, which together allows for a more uniform approach to bottom bracket fitment, better sealing against contamination, and forward and backward compatibility. Now everyone can benefit from a new measure of performance and durability. Details: Series: NX Eagle Speeds: 11-speed, 12-speed, Number of chainrings: 1 Chainring material: Aluminum, steel Crankarm material: 6000 series forged aluminum BCD: Direct mount Bottom bracket not included NX Eagle DUB Crankset - Non-Boost (142mm) Chainline: 49.0mm Hub: 135/142mm Chainring teeth: 32 NX Eagle DUB Crankset - Boost (148mm) Chainline: 52.0mm Hub: 141/148mm Chainring teeth: 32 NX Eagle DUB Crankset - Fat Bike (177mm) Chainline: 66.5mm Hub: 170/177mm Chainring teeth: 30 Compatibility: Chain: SRAM Eagle 12-speed chains, SRAM 11-speed chains Bottom Bracket: SRAM DUB bottom brackets Pedal: All 9/16" pedals