SRAM RED 1X D1 DUB CRANKSETDESIGNED FOR TRIATHLON, TIME TRIAL, AND CROSSIf you've ever ridden in a triathlon, time trial, or cyclocross, then you'd know that these disciplines are made for 1x cranksets. The SRAM Red 1x D1 DUB Crankset offers demanding riders and racers the right mix of features which include aerodynamics, durability, and simplicity. It has a single-ring drivetrain that simplifies your riding and reduces weight since you won't have an extra chainring or front derailleur. The SRAM X-Sync wide-tooth, narrow-tooth chainring technology provides exceptional chain control while you're riding and the laser-etched chainring finish is more durable. The 48T and 50T versions of this crankset come with a direct-mount aero chainring for better aerodynamics, but non-aero chainrings can be installed with a single tool. On top of all this, you can upgrade this crankset to a power meter so you can train and race with maximum efficiency. So if you're looking for the perfect crankset to fill your 1x needs, then you'll love the SRAM Red 1x D1 DUB Crankset.FeaturesSingle-ring drivetrain simplifies functionality and reduces weightSRAM X-SYNC chainring technology provides excellent chain controlLaser-etched chainring finish is more durableCan be upgraded to a power meter so you can train and race with max efficiencySPECIFICATIONSSpeeds12BB CompatibilityDUBChain Ring40, 46TCrank Arm Length165, 167.5, 170, 172.5, 175, 177.5mmBB Spindle Interface24mm, DUBChainring MaterialAluminumBolt Center Diameter (BCD)107mm, Direct MountCrank Arm MaterialCarbon FiberChainline45.0mmBottom Bracket IncludedNoIntended UseTriathlon, Time Trial, CyclocrossWeight- | SRAM Red AXS 1X DUB 40T Crankset, D1 Crankset, Red, 1x, D1 DUB, 172.5mm, 40T, Carbon