IRD (Interloc Racing Design) is a well-respected brand known for producing high-quality bicycle components, particularly for road, gravel, and touring bikes. Their product range includes derailleurs, headsets, brakes, chainrings, and other drivetrain components, all designed with a focus on performance, precision, and durability. IRD is recognized for its attention to detail and commitment to creating reliable, long-lasting components, making them a favorite among cyclists looking for performance upgrades and custom bike builds.