1. Reducing Friction: Oil acts as a lubricant, reducing friction between the chain links and the sprockets. This reduces wear and tear on the chain and components, making the bike more efficient.
2. Extending Chain Life: By reducing friction, oil helps extend the life of the chain by preventing premature wear. A well-lubricated chain will last longer than a dry chain.
3. Protecting against Dirt and Grime: Oil helps prevent dirt, dust, and grime from accumulating on the chain. This helps keep the chain clean and prevents it from becoming clogged, which can affect its performance.
4. Water Displacement: Oil can help displace water from the chain, which is important in wet conditions. Water can cause the chain to rust, so oil acts as a barrier to prevent water from coming into contact with the metal surfaces.
While oiling a bicycle chain does not directly prevent rust, it does help to maintain the chain and extend its lifespan. By reducing friction, protecting against dirt and grime, and displacing water, oil indirectly helps to prevent rust by keeping the chain in good condition. Regular cleaning and maintenance of the chain, including proper lubrication, are essential for preventing rust and ensuring the smooth functioning of the bike.