4" x 2" Cast lron V-Groove Wheel Kingpinless Swivel Caster - 600 Lbs Capacity plate-size- 3-1/8-x-4-1/8 These bearings also work well

These bearings also work well for applications that are particularly hard on bearings

Wheel Durometer:Rockwell 74 B Wheel Tread Shape:V-Groove Temp Range: -45˚F to 800˚F Wheel Color:Red Weight: 4 lbs

Weight: 0

Link to Matching Rigid Brake Caster:P50042CIRBTLB

Swivel Radius: N/A Overall Height: 6-1/2" Swivel Construction:  N/A Temp Range: -40°F to 550°F  Mounting Plate: 4" x 4-1/2" U-Groove Width: 1

4" x 2" Cast lron V-Groove Wheel Kingpinless Swivel Caster - 600 Lbs Capacity plate-size- 3-1/8-x-4-1/8 These bearings also work well4" x 2" Cast lron V Groove Wheel Kingpinless Swivel Caster Part # P51042VIRB V groove wheels are designed to guide equipment by rolling on inverted angle iron track, however, they can also operate off the track thanks to the tread on either side of the v groove. Cast Iron is the standard metal wheel used by most unless a heavier capacity or greater impact strength metal wheel is needed. For applications requiring more capacity or impact strength,