FSA PowerBox Powermeter Alloy BB386 Crankset

The FSA Powerbox Alloy ABS BB386EVO Powermeter road crank was developed in conjunction with respected German brand power2max® integrating cutting-edge technology into crank arms and chainrings. So the powermeter measures precisely power output on both your left and right legs before transmitting that information via ANT+ to a compatible bike computer (not included).

The cold-forged aluminum arms are heavily scalloped for the maximum strength to weight ratio, while the versatile BB386 spindle is forged from an even stronger aluminium alloy. The 30 mm spindle is compatible with English Threaded, Shimano Press Fit and BB30 bottom brackets with just a few simple spacers.

The chainrings are fully CNC-machined from 7075 aluminium. The outer ring is ramped and pinned for fast and precisely shifting. Finally, the chainring bolts are ChroMoly steel for exceptional strength.

The ABS Spider system - Asymmetric Bolt Spacing is boosting stiffness further. The 110 mm asymmetrical spider offers extra strength just where it is needed to resist power strokes and keep shifting ultra-crisp.

BB386EVO is based on the existing BB30 system. The revolution of the 30 mm spindle opened the door for the most significant improvement in crank design in many years. BB30 raised the bar for crank set weight, stiffness, and design. The key is the 30 mm diameter alloy spindle, formed in a high-pressure, low-speed extrusion process. The 30 mm spindle improved torsional stiffness, while reducing the spindle, and increasing the contact area between the crank arm and the spindle.

The BB386EVO design simply modifies the BB30 design to a wider width, and incorporates a press fit bearing cup, rather than the direct fit bearing of the BB30 system. This slight modification allows the adaptability of the design to other BB shells, and gives the frame builder more landscape to craft their frames.