1. Different materials are suitable for various bicycle parts. Frames can be made from carbon steel, chromium-molybdenum steel, or aluminum due to their strength and light weight. 2. Spokes are typically made from steel or carbon fiber. Hubs are usually made from aluminum due to its lightness. 3. Tires are made of rubber compounds reinforced with fabric or wire. Chains are usually made of steel or special alloy steel to be durable. Forks can be made from carbon fiber or steel for strength.