What are the key features to consider when choosing a trials bicycle?

When choosing a trials bicycle, key features to consider include the frame material, wheel size, brake type, and suspension system. The frame material should be lightweight and durable, such as aluminum or carbon fiber. Wheel size typically ranges from 20 to 26 inches, with smaller wheels offering more maneuverability. Disc brakes are preferred for their superior stopping power, and a good suspension system can help absorb shocks and improve control over rough terrain.