Bring your wheel build to life with the Hydra Classic Boost 6B rear hub. Designed for modern mountain bikes, this hub delivers smooth, reliable engagement, robust durability, and precise performance. Its Boost spacing, Shimano Micro Spline compatibility, and striking green finish make it as functional as it is eye-catching. Key Features: Boost 148mm Spacing: Enhances frame stiffness and improves cornering precision for modern mountain bikes. Shimano Micro Spline Compatible: Optimized for 12-speed Shimano drivetrains for crisp, reliable shifting. 28-Hole Configuration: Ideal for lightweight yet strong wheel builds suitable for trail and XC riding. 12mm Thru-Axle Ready: Ensures secure, wobble-free installation for maximum stability on rough terrain. Durable & Vibrant Finish: Green anodized surface resists wear and adds visual appeal to your build. 6-Bolt Disc Compatible: Provides a secure interface for reliable braking performance.