• Made with high-quality materials for excellent chain retention and a smooth riding experience. • Compatible with different types of bicycles: folding, urban, and electric. • Ideal for repairing and upgrading bicycles, compatible with multiple models. • Lightweight and durable design that enhances the bike's performance and durability. • Optimal crank length of 170 mm for efficient riding. • Technical data: 48TB double cover x 170 mm, square hole, 9/16 pedal axle. • Includes chain cover and is compatible with 6/7-speed bicycles. • Color: black. Material: aluminum alloy. • Product dimensions: 24 cm wide, 4 cm high, 28 cm long. • Product weight: 0.8 kg.