Wheel; 4" x 1-1/4"; Monoprene (Donut); Delrin Top Hat Brng; 3/8" Bore; 1-5/8" Hub Length; 250# (Shepherd 009907)
Wheel Diameter: 4"Tread Width: 1-1/4"Material: Monoprene (Donut)Load Rating (Per Item): 250 poundsBearing: Delrin Top HatsBore: 3/8"Hub Length: 1-5/8"Shipping Weight: 0.4 lbs.Usually Ships in: 7-10 days (may be affected by quantity ordered)
When selecting a wheel, make sure to get the weight capacity needed along with the diameter, width, and axle bore. In some cases, the hub length is critical to a good fit. As with casters, the larger the wheel, the easier the push will be. Pay attention to hard vs soft wheels, propensity to flatten and marking vs non-marking.
Remember that larger diameter equates to ease-of-roll while wider width equates to higher weigth capacity.
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.