Do you mean like wagon wheel size? Look at a car wheel, it is smaller than a traditional bicycle wheel. Look at a motorcycle or motor scooter wheel size, even smaller than a Gocycle wheel! For on on road / urban riding, compact wheels are simply better. They are lighter, stronger, and allow for more space for carrying luggage. They stop faster and accelerate faster. They also allow freedom of design for frame shapes better suited to how we use and live with a bicycle in our everyday lives. The world’s fastest bicycles are all running on Gocycle sized wheels. The UCI banned compact size wheels because they were faster! Compact wheels mean you can fit the Gocycle into city living spaces or elevators. And besides being better, they simply look cooler!
Answer by Richard Thorpe - Gocycle's designer