SRAM FORCE WIDE D2 172x43/30 DUB NoBB IR-BKX Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear With tight 13 tooth gaps between chainrings paired to wide range cassettes, riders get more range while shifting less frequently and staying in the big ring longer Wide chainline crankset for bikes with up to 700x45c or 27. 5x2. 1 tire widths Longer DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for