Wheel Diameter Tread Width Bearing Type Bore Hole Size Hub Length Load Cap Model Number Flat Tread Crown Tread 3 11/4 Roller 1/2 15/8 350 W314SS W314SS-CR 2 1/2 23/16 600 W320SS 3.25 2 Roller 13/16 23/16 600 4 11/4 Roller 1/2 15/8 400 W414SS 11/2 Roller 13/16 15/8 500 W415SS 2 Roller/Ball 13/16 13/16 700 W420SS W420SS-CR 5 11/4 Roller 1/2 13/16 500 W514SS W514SS-CR 11/2 Roller 13/16 15/8 500 W515SS W515SS-CR 2 Roller/Ball 13/16 23/16 1000 W520SS W520SS-CR 6 2 Roller/Ball 13/16 23/16 1200 W620SS W620SS-CR 3 115/16 31/4 2500 W630SS W630SS-CR 8 2 Roller/Ball 13/16 23/16 1400 W820SS W820SS-CR 21/2 115/16 23/4 2200 W825SS W825SS-CR 3 115/16 31/4 2500 W830SS W830SS-CR 10 21/2 Roller/Ball 115/16 23/4 2300 W1025SS W1025SS-CR 3 115/16 31/4 2500 W1030SS W1030SS-CR 12 21/2 Roller/Ball 115/16 23/4 2300 W1225SS W1225SS-CR 3 115/16 31/4 3000 W1230SS W1230SS-CR
