100% Pure PAUL Cranks are precision CNC-machined in-house from ultra-strong 2024 American aluminum alloy known for it's extradinary fatigue resistance. This allows Paul Component Engineering to remove a lot of material for an elegant design, while retaining excellent strength and stiffness. J.I.S. Square Taper means you can really fine-tune the Q-Factor and a 3-bolt Direct-Mount means you can choose from a wide range of chainrings and offset options. Updated design of Paul's classic 100% Pure Cranks features a 3-bolt direct-mount chainring spline and self-extracting crankbolts (Chainring sold separately) J.I.S Square Taper crank interface allows you to really fine-tune the Q-factor and chainstay clearance of the crankarms via Bottom Bracket spindle length (bottom bracket sold separately) Design allows you to get the chainring nice and close to the chainstay for better chainline in the bigger rear cogs via chainring offset (0, -3, -6) Cranks include: Crank bolts, extractor caps, and chainring bolts (chainring and bottom bracket sold separately) Specifications Number of ChainringsNo Rings, No Spider IncludedChainring BCDDirect Mount SRAM 3-BoltColorBlackCrank Length (mm)160Weight500BB IncludedNoPedal Spindle9/16"Spindle Interface TypeSquare Taper JISDefined ColorBlack