Upgrade your mountain biking experience with the XT SL-M780-B-I and SLX SL-M670-B-I Bolt and Nut Unit, I-Spec B. Designed for durability, precision, and seamless integration, this essential component enhances your shifting performance on rugged trails and demanding climbs. Materials and Durable Construction: Constructed from corrosion-resistant, high-strength aluminum and stainless steel, the XT SL-M780-B-I and SLX SL-M670-B-I Bolt and Nut Unit ensures long-lasting performance even in harsh outdoor environments. These components are engineered to withstand mud, water, and bike grime, maintaining reliable shifting under all conditions. Innovative Performance & Engineering: Optimized for smooth and precise gear changes, these bolt and nut units contribute to the overall responsiveness of 's acclaimed 2x or 3x drivetrain systems. Their engineering minimizes play and vibration, providing crisp shifting and improved reaction times, making them ideal for aggressive trail riding and cross-country cycling. Components & Technology: Featuring I-Spec B compatibility, these units allow for a clean and clutter-free cockpit by integrating shifters directly into brake levers, reducing handlebar clutter and improving ergonomics. The quick-release design simplifies installation and maintenance, ensuring your bike remains in top condition with minimal effort. Style & Use Case: Designed for mountain bikers seeking reliable, high-performance parts, the XT SL-M780-B-I and SLX SL-M670-B-I Bolt and Nut Units are perfect for upgrading existing shifters or building a custom drivetrain setup. Their sleek, color-matched finish complements a wide range of bike styles, from aggressive trail rigs to cross-country racers. Special Features & Benefits: - Compatible with I-Spec B mounting standards - Precise bolt and nut design for secure fitting - Corrosion-resistant materials for extended lifespan - Compatible with XT and SLX shifter mod