【NOTE: 10mm U-Groove】-- Installing the rear pedal is easy. Simply attach it to the bicycle's rear axle and secure it with a locking screw for added stability. Please note that the foot clamp is 10mm, so check the size of your mounting bolts before installation. 【Foldable Design】-- Our rear bicycle pedals feature a unique foldable design, making them easy to fold and store to save space. When not in use, simply fold them to minimize bulk and maximize convenience. The foldable feature ensures no scratches to items or people when riding without passengers. 【Enhanced Comfort and Stability】-- These small rear pedals measure 11 x 4.5 cm when unfolded and serve as excellent footrests for passengers sitting on the back seat of your bicycle. They effectively protect your feet from contact with the car wheel, increasing safety. Additionally, these pedals provide extra comfort, allowing you to sit relaxed and comfortable during long journeys. 【Durable Lightweight】-- Made from high-quality aluminum alloy material, they are lightweight and durable, with high strength for long service life. The 16mm thick design enhances load-bearing capacity, even when standing on them, they still maintain good stability. 【Non-slip Versatile Compatibility】-- The surface of the pedals is equipped with serrated grooves, and this non-slip design allows you to confidently stand on the pedals without worrying about them slipping. Our rear bicycle pedals are suitable for most electric bikes, mountain bikes, road bikes, and more.