Bad Boy 022-8049-00.  11x6.00-5 Front Wheel / Tire Assembly - MZ.  For tire only select Rotary 14592.  Includes (2) bearings 99502HNR (99502H-2RS Rotary 481).  Bearings are 5/8" ID, 1-3/8" OD, 7/16" Height.

*This price is for one wheel assembly, the second picture is just for side view reference*

SR-4