More than just a chainset, SRAM's new Red DUB Chainset combines the new slick shifting X-Range one-piece chainrings with a Quarq Dzero Power meter to provide highly accurate power measurement and some of the slickest shifting available.X-Range gearing provides more range and smoother gear progression, so you're always in the right gearUnique one-piece chainring design features a built in Quarq Dzero Power MeterPower meter is accurate within +/- 1.5% and balances power between left and right leg separatelyCarbon-tuned crank arms are super light and incredibly stiffDUB bottom bracket system adds durability, simplicity and broad compatibility (DUB BB sold separately)The highlight of the new Red DUB AXS Power Meter Chainset is the X-Range chainrings with a built in Quarq Dzero Power meter. Using a unique one-piece design that bolts straight to the crank arms, the X-Range rings work in conjunction with the X-Range XG-1290 cassette to provide a wider gear range and smoother progression betwe