What Our Gearhead® Experts Are Saying: "The Eagle 90 ISIS Pedal Assist Crank Arm Assembly is stiff, lightweight, and built for high-performance e-MTB riding. The forged aluminum arms offer exceptional strength-to-weight ratio, while the ISIS spindle interface ensures a secure and flex-free fit. With multiple crank arm lengths, I can fine-tune my setup for better clearance and pedaling efficiency. Whether I’m navigating tight technical trails or hammering descents, this crankset keeps my power transfer smooth and efficient."The Eagle 90 ISIS Pedal Assist Crank Arm Assembly is built for riders who demand lightweight efficiency without sacrificing durability. With forged aluminum construction, these crank arms provide maximum stiffness and power transfer while keeping weight to a minimum. Designed for seamless integration with ISIS spindle-based e-MTB motors, this crankset ensures a rock-solid connection, allowing riders to push their limits without worrying about flex or instability. Available in 150mm to 170mm crank lengths, we can dial in the perfect setup for better pedal clearance and optimized performance on technical terrain. Whether climbing steep switchbacks or blasting down fast descents, the Eagle 90 Crankset is the ultimate pedal-assist upgrade.