Experience the ultimate in low-impact cardio exercise with the Eccentric Crank Arm, a premium replacement part designed specifically for Nautilus E916 and Stairmaster ClubStride 5100 elliptical machines. This high-quality crank arm is engineered to meet or exceed OEM standards, ensuring a seamless and reliable performance for your fitness routine. Whether you're a fitness enthusiast or a commercial gym owner, this crank arm is the perfect solution to get your elliptical machine up and running smoothly.

The Eccentric Crank Arm is carefully crafted to fit both left and right OEM crank arm part numbers 40784 and 40783, ensuring a precise and secure installation. This means you can enjoy uninterrupted workouts without having to worry about the crank arm failing or malfunctioning. Made with durable materials and built to last, this crank arm is designed to withstand the rigors of frequent use, making it an excellent choice for high-traffic commercial gyms or busy home fitness spaces.

For Nautilus E916 elliptical owners, this crank arm is a godsend, providing a reliable and efficient way to get back to your fitness routine. With its precision engineering and durable construction, you can trust that this crank arm will keep your workout sessions running smoothly. Plus, its ease of installation means you can get back to your fitness goals in no time, without having to spend hours trying to figure out complicated installation procedures.

Stairmaster ClubStride 5100 owners, rejoice! This crank arm is also designed to meet the exacting standards of your high-performance elliptical machine. By choosing this crank arm, you can rest assured that you're getting a part that's specifically designed to work in harmony with your machine, providing a seamless and unrivaled workout experience.

The Eccentric Crank Arm is an excellent value for anyone seeking a reliable and high-quality replacement part for their Nautilus E916 or Stairmaster ClubStride 5100 elliptical machine. With its precision engineering, durable construction, and easy installation, this crank arm is the perfect solution for fitness enthusiasts and gym owners alike. Whether you're looking to replace a worn-out crank arm or simply want to upgrade your machine's performance, this crank arm is the perfect choice.

By choosing the Eccentric Crank Arm, you're investing in a premium replacement part that's designed to provide years of reliable service. With its robust construction and precision engineering, this crank arm is the perfect way to get your elliptical machine running smoothly and efficiently. So why wait? Get back to your fitness goals with confidence, knowing that your elliptical machine is equipped with a high-quality crank arm that's built to last.