- Versatile Compatibility: Designed for RM30, RM40, and RM60 hubs, this freewheel body accommodates 7, 8, 9, and 10-speed cassettes, making it an ideal choice for a wide range of bicycle models. - High-Quality Manufacturing: Crafted from robust steel, this freewheel body ensures durability and dependable performance. Its precise engineering guarantees smooth operation and effective power transmission, enhancing your cycling experience. - User-Friendly Installation: Installation is straightforward with clear markings for each speed (7-speed inside/outside, 8/9/10-speed inside/outside), simplifying the setup process and ensuring accuracy. - Durable and Stylish Design: The sleek black finish not only looks great but also provides excellent protection against corrosion and wear, extending the lifespan of your bicycle components. Use Scenarios: 1. Urban Commuting: Ideal for daily riders who need a reliable and versatile freewheel body for navigating city streets with varying terrain. 2. Mountain Biking: Perfect for off-road cyclists looking for a durable solution that withstands rough conditions while maintaining performance. 3. Road Cycling: A great choice for road cyclists who require smooth shifting and consistent power transmission during long rides. Upgrade your cycling setup with this dependable freewheel body, designed for compatibility, performance, and longevity.