The ACID Pedals C4-ZP Rookie are available in three distinct sizes, to cater for the needs of a range of young riders. The tough plastic cage, durable boron axle, nylon bushing and attached reflectors are common to each version. The medium pedal is very similar to its smaller counterpart, but scaled up in size to cater for children around 4 to 7 in age. The slightly larger platform gives their growing feet a more stable platform for enthusiastic pedalling.