Dutton-Lainson Dutton Lainson 6500 Series Trailer Wheel Bearing Set 1.375in x 1.0625" Spindle. Trailer Wheel Bearing Set 21866 (Model 6508) features a 1.375" x 1.0625" (outer diameter). The inner diameter of the outer hub is 1.98". Compatible with outer bearing cone number L44649 and inner bearing cone number L68149. Compatible with outer cup number L44610 and inner cup number L68110. Features of Dutton-Lainson 21866 Dutton Lainson 6500 Series Trailer Wheel Bearing Set 1.375in x 1.0625" Spindle 6500 series wheel bearings Includes 2 bearings with races 1 grease seal and 1 cotter pin Outer Diameter of Spindle: 1.375" x 1.0625" Inner Diameter of Outer Hub: 1.98" Compatible with outer bearing cone number L44649 and inner bearing cone number L68149; Compatible with outer cup number L44610 and inner cup number L68110 Package Contents: Dutton-Lainson 21866 Dutton Lainson 6500 Series Trailer Wheel Bearing Set 1.375in x 1.0625" Spindle Dutton-Lainson 21866: Dutton Lainson 6500 Series Trailer Wheel Bearing Set 1.375in x 1.0625" Spindle