Bearing Protector Poly 45MM

Replaces grease cap and once full of grease keeps bearings lubricated. Eliminates premature bearing failure by keeping moisture out and bearings full of grease as grease is under slight pressure.

Now using a grease gun, fill hubs until piston on Trojan Bearing Boss comes out towards you. Over-filling will cause grease to be purged around the edge of the piston.