Caliber: steerer tube diameter 28.6 mm; handlebar clamp diameter 31.8 mm Compatibility - Fits most MTB bikes and 31.8 mm handlebars - Suitable as a replacement for road or mountain bike stems - Compatible with high-end boutique MTB stems and standard 31.8 mm bar setups High quality and design - Color stainless steel screws for corrosion resistance and a clean look - Distinctive, functional shape - Pressure-sensitive labeling design for easy orientation and installation Function and performance - Perfect replacement to dial in your fit on a road or mountain bike - Ideal for upgrading existing builds or starting a new build with a precise fit Use scenarios - Upgrading an older MTB or road bike to a modern 31.8 mm handlebar setup for improved control - Replacing a worn or damaged stem on a mountain bike to restore fit and handling - Building a new bike that uses 31.8 mm handlebars and requires accurate stem alignment for optimal ride position