The Race Face Aeffect Crankarms 170mm Black are engineered for aggressive trail riding while maintaining a lightweight profile suitable for XC enthusiasts. Constructed from durable 6066 aluminium, these crankarms optimize stiffness and performance. Featuring the innovative Cinch System, they allow for easy interchangeability of spider options, accommodating various chainring standards. Weighing in at just 650 grams, the Aeffect crankarms provide a robust solution for modern XC, trail, and enduro riders looking for reliability and versatility on the trail.