Refurbished reasons: It shows signs of having been used. The original box is not in perfect condition.True competitors are always looking for a performance advantage — a relentless pursuit of equipment that is lighter, stiffer, stronger and more durable. To create the best drivetrain possible, we re-examined and re-engineered our crankset design. Our all-new XX1 Eagle CARBON TUNED crankset is our lightest, stiffest and strongest to date. DUB technology enhances this by simplifying the relationship of the spindle to the bottom bracket, and redefining the measure of durability. DUB-powered cranksets deliver simplicity, compatibility and durability.Features:- DUB technology delivers the lightest, stiffest and strongest crankset available- SRAM CARBON TUNED crank technology provides extreme stiffness and light weight- The X-SYNC 2 chainring provides significantly quieter performance, with better mud clearing and extraordinary durability- New colorway is matched to work with XX1 Eagle AXS enabled componentrySpecifications:- Speeds: 11/12- BB Compatibility: DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP- Chainring Size: 34- Crank arm length: 170mm- Chainline: 55.0mm- BB Spindle Interface: DUB- Chainring material: Aluminum- Guard: No Guard- Bolt Circle Diameter (BCD): Direct Mount (DM)- Crank arm material: Carbon