National Lubricating Grease Institute (NLGI) tests and approves greases for particular application. NLGI GC-LB is a nomenclature that certifies the best greases for use in wheel bearings “GC” and chassis parts “LB”.

PSC provides greases that are recommended by NLGI and recognizes by most hub manufactures that require a grease for the lubrication of their axle bearings.