The Fitbikeco KMX97R Drive Unit 9T is designed for high performance and reliability, featuring a sealed bearing design that boosts durability and minimizes maintenance. It is compatible with select EOM Fit Bike sealed bearing hubs for a perfect fit. With a 9T gear ratio, it offers optimal performance, making it ideal for riders looking for efficiency and smooth operation. Lightweight and precision-engineered, the KMX97R enhances your biking experience.