1. Practical and durable: Made from high quality materials, this locking disc brake hub lockring delivers lasting performance and reliable use. 2. Wide compatibility: Designed for 9/12/15 mm axle mid-lock hubs; compatible with a range of axle sizes for versatile use across different bikes. 3. Easy installation: The lockring is easy to install on the mid-lock hub, enabling effortless fitting of a six-pole disc. Provides a convenient and secure locking mechanism. 4. Lightweight design: Weighs about 12 g; lightweight and adds no unnecessary weight, helping preserve an optimal riding experience. 5. Use scenario - Wheel upgrades: Ideal when upgrading or replacing lockrings on road, mountain, or gravel bikes that use mid-lock hubs with 9/12/15 mm axles. 6. Use scenario - Field service: Suitable for quick on-site repairs or routine maintenance on bikes with different axle sizes. 7. Use scenario - Workshop versatility: A practical choice for bike shops or home workshops servicing multiple wheelsets with varied axle standards.