This mountain road bike headset is built for durability and longlasting performance, designed to withstand the rigors of intense cycling activities. Key benefits Longlasting durability: engineered to provide reliable performance over time in demanding riding conditions. Precision craftsmanship: forged CNC machined shell with aluminum alloy construction and anodized coloring for a precise fit and attractive finish. Smooth and quiet riding: two stainless steel sealed bearings, upper and lower, deliver smooth rotation and a quiet riding experience with strong bearing support. Clear compatibility: designed for bikes with an inner diameter head tube frame (upper and lower) and a 6 mm outer diameter upper tube, ensuring a proper fit and performance. Specifications and features Material: aluminum alloy with a forged CNC machining shell. Finish: anodized coloring for added durability and aesthetic appeal. Bearings: two stainless steel sealed bearings (upper and lower) for smooth, reliable rotation. Compatibility: inner diameter head tube frame (upper and lower) with a 6 mm outer diameter upper tube. Use scenarios Mountain trail rides and rugged road sessions: provides reliable steering response and smooth rotation on uneven surfaces, helping you maintain control on technical descents and climbs. Longdistance training on mixed surfaces: maintains consistent performance and efficient rotation over extended rides, reducing wear and fatigue. Bike upgrades or builds: suitable for frames requiring an inner diameter head tube (upper and lower) and a 6 mm outer diameter upper tube, delivering a precise fit and improved headset performance. This description preserves the product's intended brand voice, specifications, models, and functions while presenting clear, customerfocused benefits and practical applications.