What are bicycle bearing greases?
Bicycle bearing greases are specially formulated lubricants designed to reduce the friction between the moving parts of your bicycle. They typically consist of a base oil, a thickener, and additives that help to enhance their performance. The base oil is the primary lubricant, while the thickener provides the grease with its consistency, allowing it to stay in place and not run off. The additives are typically used to enhance the grease's performance, for example, by improving its resistance to high temperatures or increasing its resistance to water.
Types of bicycle bearing greases
There are several different types of bicycle bearing greases available, each with its own unique properties that make them suitable for specific applications. Some of the most common types of bicycle bearing greases include:
1. Lithium-based greases
Lithium-based greases are one of the most commonly used types of bearing greases. They are versatile and can be used in a wide range of applications. Lithium greases are also generally resistant to water and offer good resistance to high temperatures. However, they can harden over time, making them less effective at lubricating bearings.
2. Polyurea greases
Polyurea greases are designed to provide superior performance in extreme temperatures. They can withstand both high and low temperatures without losing their effectiveness, making them suitable for use in all seasons. They are also highly resistant to water, which can help to protect your bearings from corrosion.
3. Calcium sulfonate greases
Calcium sulfonate greases are known for their excellent corrosion resistance properties. They are highly water-resistant and can provide long-lasting protection against rust and corrosion. They are also highly versatile and can be used in a wide range of applications.
4. Aluminum complex greases
Aluminum complex greases are designed to provide superior lubrication performance in high-temperature applications. They can withstand temperatures of up to 400°F (204°C) without breaking down, making them well-suited for use in the high-temperature environments that are often found in bicycle bearings. They are also highly resistant to water and offer excellent anti-wear properties.
Which bicycle bearing grease is the best?
Choosing the right bicycle bearing grease can be a bit overwhelming, but the most important factor to consider when selecting a grease is the type of bearing you are working with. For instance, bearings that have rubber coverings require a grease that can penetrate through the rubber and reach the metal surfaces, while bearings that are exposed to water and moisture require a grease that is highly water-resistant.
In general, lithium-based greases are the most commonly used bicycle bearing greases, and they are suitable for most applications. However, if you need a grease that can withstand high temperatures or is highly water-resistant, you may want to consider a polyurea, aluminum complex, or calcium sulfonate grease.
When applying the bicycle bearing grease, it's important to apply it in a thin and even layer, so that it can penetrate through the rubber covering (if applicable) and reach the metal surfaces. Over-lubricating your bearings can cause excessive grease buildup, which can attract dirt and debris and ultimately do more harm than good.
Conclusion
In summary, choosing the right bicycle bearing grease is important for maintaining your bicycle and ensuring that it performs at its best. The most commonly used bicycle bearing greases are lithium-based, but other types such as polyurea, aluminum complex, and calcium sulfonate greases, may be necessary for specific bearing applications. Remember to apply the grease in a thin and even layer to avoid over-lubrication and attracting dirt and debris. With proper lubrication and maintenance, your bicycle bearings can endure for a long time.