Caster; Swivel; 4 x 2; Thermoplastized Rubber; Top Plate; 5x5-1/2; hole spacing: 4-1/8x4-1/2; 7/16 bolt; Zinc; Roller Brng; 300#; Zerk Axle
Wheel Diameter: 4"Tread Width: 2"Material: Thermoplastized Rubber (Gray)Load Rating (Per Item): 300 poundsFinish: ZincConnector Details: Plate (5"x5-1/2"; holes: 4-1/8"x4-1/2"; 7/16" bolt)Bearing: Roller BrngMisc Options: Zerk AxleLoad Height: 5-5/8"Swivel Radius: 3-9/16"Shipping Weight: 3 lbs.Usually Ships in: 1-3 Days (may be affected by quantity ordered)
Thermoplastic Rubber (TPR) wheels are precision molded and mechanically locked to a durable polyolefin core to provide an economical wheel for many applications. They provide a smooth, cushioned ride and can overcome small debris and obstacles on the floor. They offer floor protection, are non-marking and non-conductive. These often have various brand names by various manufacturers and can be flat or crowned.
TPR are considered soft wheels which may experience flat-spotting even when loaded within the acceptable weight limits. Flat-spotting is more noticeable in warmer weather. The flat-spotting will roll-out and dissipate after a few minutes of rolling, depending on the size of the standing load and extent of the flat-spotting. This is a normal occurrence of these wheels and is not a product failure. If your application cannot tolerate this temporary condition, another material type may be preferable.