8" x 2" Ductile Steel Wheel AR Rigid Caster - 1250 Lbs Capacity overall-height-3-1/4 While ductile steel is very

While ductile steel is very hard

they can also operate off the track thanks to the tread on either side of the v-groove

6" x 3" Cast Iron Wheel Swivel Caster - Part # P7006301102

400 Hub Length (Plain Bore): 2-3/16 Wheel Diameter: 6" Hub Length (with Bearings): 2-7/16"

8" x 2" Ductile Steel Wheel AR Rigid Caster - 1250 Lbs Capacity overall-height-3-1/4 While ductile steel is very8" x 2" Ductile Steel Wheel AR Rigid Caster Part # 28AR12 Manufactured from a high strength steel alloy, ductile steel offers improved capacity, durability & impact resistance compared to standard cast iron wheels. Ductile steel provides approximately 45,000 PSI tensile strength & features a thicker tread, spokes & hubs to withstand abusive industrial applications. Its moderately crowned tread design further reduces friction during rolling, swiveling