What Our Gearhead® Experts Are Saying: "The Eagle 90 ISIS BDU38 Pedal Assist Crank Arm Assembly is built for serious e-MTB performance. The forged aluminum arms provide stiff power transfer, while the ISIS spindle interface ensures a secure, flex-free connection. Specifically designed for Bosch BDU38 motor systems, this crankset integrates seamlessly into high-performance pedal-assist setups. With multiple crank arm lengths, I can dial in my ride for better clearance, comfort, and efficiency on technical terrain."E-MTB riders demand strength, efficiency, and seamless integration, and the Eagle 90 ISIS BDU38 Pedal Assist Crank Arm Assembly delivers on all fronts. With forged aluminum construction, these crank arms provide exceptional durability and stiffness, ensuring smooth, powerful pedal strokes on the most challenging trails. Designed specifically for Bosch BDU38 motor systems, this crankset ensures a rock-solid interface, allowing for maximum power transfer with minimal flex. Available in 150mm to 170mm crank lengths, we can fine-tune our setup for optimized pedaling efficiency and improved clearance. Whether tackling steep switchbacks or high-speed descents, the Eagle 90 BDU38 Crankset is the perfect upgrade for high-performance pedal-assist riding.