| abstract |
The invention provides a grease composition for a hub bearing unit comprising (a) as a base oil a mixture of a synthetic hydrocarbon oil and an ester-type synthetic oil, wherein the content of the ester-type synthetic oil is 20 to 50 parts by mass with respect to 100 parts by mass of the synthetic hydrocarbon oil of the synthetic ester-type oil, and the base oil has a kinematic viscosity at 40 ° C of 20 to 80 mm 2 / s, and (b) a urea compound as a thickener. |