BR-R451 Rear Mid-Reach Road Caliper in Black is crafted with lightweight, durable materials to ensure optimal performance and longevity on the road. Engineered with advanced caliper technology and precise machining, this brake caliper provides reliable stopping power and highly responsive braking performance, even under demanding conditions. Designed for compatibility with STI and brake levers that are Super SLR enabled, including models like Dura Ace Di2, Di2, 105, and Tiagra, making it a versatile choice for high-end road bike setups. Featuring adjustable toe-in brake shoes and short pull Super SLR actuation, these calipers deliver smooth, accurate braking with customizable alignment for enhanced comfort and control during long rides or spirited descents. Ideal for mid-reach road bike applications (47mm - 57mm), the BR-R451 combines sleek black style with performance-driven engineering, perfect for upgrading your bike's braking system for improved safety and style. Upgrade your road bike's braking performance with the BR-R451 Rear Mid-Reach Road Caliper in sleek black. Engineered for precision, durability, and reliable stopping power, this caliper is designed to enhance your cycling experience, whether you're commuting, racing, or training. Materials & Construction: Constructed from lightweight yet sturdy materials, the BR-R451 caliper features high-grade alloy arms that ensure optimal strength-to-weight ratio. Its corrosion-resistant finish extends the lifespan of the caliper, making it ideal for various riding conditions. Performance & Engineering: Designed for precise modulation and quick response, this caliper delivers light action braking with accurate power transfer. Its adjustable toe-in brake shoes allow for customized pad alignment, ensuring optimal contact with the rim and improved braking efficiency. The short-pull Super SLR actuation mechanism offers an immediate response, making your stops smoother and more controlled. Components & Technology: Compatible with STI and brake levers that are Super SLR enabled - including Dura Ace Di2 7970, Dura Ace 7900, Di2 6770, 6700, 105 5700, and Tiagra 4600 - the BR-R451 provides seamless integration for high-performance road setups. The cartridge pad type simplifies installation and replacement, while the mid-reach design (47mm - 57mm) fits a wide range of road bike frames. Style & Use Case: Featuring a sleek black finish, the BR-R451 is as stylish as it is functional. Its versatile design makes it suitable for both professional racing bikes and daily commuters. Whether you're riding on smooth tarmac or tackling urban streets, these calipers provide dependable braking with a clean aesthetic. Innovative & Differentiating Features: - Compatible exclusively with Super SLR drivetrain components for optimal performance. - Adjustable toe-in brake shoes for personalized stopping power. - Designed with a mid-reach (47-57mm)