

2. Protecting Against Contamination Wheel oil seals act as barriers against external contaminants. Dust, dirt, and moisture can enter wheel assemblies if seals fail, leading to corrosion and degradation of components. Keeping these harmful agents at bay is essential for maintaining the health of the vehicle.
Additionally, rollers can be made from different materials, including nylon, metal, and composite materials. Nylon rollers are popular due to their quiet operation and resistance to corrosion. Metal rollers, on the other hand, provide increased durability, making them ideal for heavier windows.