d1 dub crank arm assemblyDelivery in 5 10 business days (EU) Finance available at checkout with humm by flexifi. QUARQ D1 DUB CRANK ARM ASSEMBLY (NO POWER) The D1 DUB Crank Arm Assembly (No Power) sits at the top of Quarqs range, with the carbon arms having a hollow Exogram construction that is both very lightweight and stiff. They have a spindle diameter of 28. 99mm making them compatible with SRAMs DUB standard bottom brackets, which are a balance between durability, weight