The Hapleby Premium Bike Pedals are designed for professional mountain and road cyclists, with a 9/16 inch pedal axle size and a durable aluminum and chromium-molybdenum construction. These modern and lightweight pedals come in a sleek black color and are compatible with road bikes. The set includes pedals for all types of bikes including mountain, road, BMX, and folding bikes. With a 1-year warranty and a compact size of 3.74 x 3.94 x 0.78 inches, these pedals are a reliable choice for adult cyclists looking for high-quality biking components.