SRAM RED Crank Arm Assembly - 172.5mm 12-Speed 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon E1 Length X Diameter (mm)-1219x6 X-Range gearing technology gives you

X-Range gearing technology gives you more range and a smoother gear progression so you're always in the right gear Tooth Count 40 Drivetrain Speeds 12 Round or Oval Round Defined Color Black Direct Mount Type Direct Mount SRAM 8-Bolt Size 40T

Insulated main compartment

Does not convert a hub or wheel to a different axle diameter or length

Speed[3] Approx

Gradients that indicate current sag and travel are conveniently located on the upper tubes

SRAM RED Crank Arm Assembly - 172.5mm 12-Speed 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon E1 Length X Diameter (mm)-1219x6 X-Range gearing technology gives youWhen SRAM found ways to make their lightest and stiffest crank even lighter they went for it. A new optimized layup drops 29g from the hollow carbon arms. Plus they're offering more crankarm lengths than ever before to ensure this crank works for you. Carbon crank arms are 29g lighter than previous generation 8 bolt interface compatible with power and non power AXS spiders and integrated chainrings (Chainrings sold separately) Rings Sold Separately