Caster; Rigid; 4 x 1-1/4; Monoprene (Donut); Top Plate (2-5/8x3-3/4; holes: 1-3/4x2-3/4 slotted to 3; 5/16 bolt); Zinc; Precision Ball Brng; 250# (Shepherd PGR40120ZN-DMT32(GG))
Wheel Diameter: 4"Tread Width: 1-1/4"Material: Monoprene (Donut)Load Rating (Per Item): 250 poundsFinish: ZincConnector Details: Plate (2-5/8"x3-3/4"; holes: 1-3/4"x2-3/4" slots to 3"; 5/16" bolt)Bearing: Precision Ball BrngLoad Height: 5-1/4"Swivel Radius: N/AShipping Weight: 1.9 lbs.Usually Ships in: 7-10 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.