Can it be used on high-load, high-RPM bearings such as wheel or crank bearings inside engines? How is its waterproof performance? Are there any differences in bearing use between 2-stroke and 4-stroke engines?

1. Applicability to High-Load and High-RPM Components (e.g., Wheel Bearings, Crank Bearings) Bell Hammer Metal Grease is a high-performance grease with excellent extreme pressure, anti-wear, and water-resistant properties. It provides sufficient lubrication for high-load and high-RPM components such as wheel bearings. In fact, many users have reported improved durability and reduced friction in applications such as motorcycle wheel bearings.

However, it is not suitable for crank bearings inside the engine, as these areas are designed for circulating lubrication with engine oil, not grease.
Grease application is not recommended for these internal engine components.
✕ Not for use: Crank bearings, connecting rod bearings, and other engine-oil-lubricated areas.

1. Water Resistance
   This product offers excellent water and washout resistance.
   It resists runoff and emulsification due to water, rain, or washing, and helps maintain long-term lubrication performance.
   Therefore, it can be safely used on parts exposed to water, such as around wheels or axle shafts.

2. Differences in 2-Stroke vs. 4-Stroke Engine Bearings
   Bearings inside both 2-stroke and 4-stroke engines (e.g., crank bearings) are typically lubricated with oil, not grease, and are not suitable for grease application.
   However, for external parts such as wheel bearings, suspension linkages, and pivot points—where grease is commonly used—Bell Hammer Metal Grease can be safely applied regardless of engine type.