Caster; Rigid; 6" x 2"; Flat Free (Black); Plate (2-1/2"x3-5/8"; holes: 1-3/4"x2-7/8" slots to 3"; 5/16" bolt); Prec BB; 250#; Sawtooth; Welded Hub
Wheel Diameter: 6"Tread Width: 2"Material: Foam-Filled Flat Free Tire (Black)Load Rating (Per Item): 250 poundsFinish: ZincConnector Details: Plate (2-1/2"x3-5/8"; holes: 1-3/4"x2-7/8" slotted to 3"; 5/16" bolt)Bearing: Precision Ball BrngMisc Options: Sawtooth TreadLoad Height: 7-1/2"Swivel Radius: N/AShipping Weight: 3.5 lbs.Usually Ships in: 24 hours (may be affected by quantity ordered)
Flat Free (also known as semi-pneumatic) are extremely popular wheels. Made to perform like a pneumatic tire, they are filled with a lightweight, microcellular polyurethane foam. They retain the lightweight, bounce and cushion like a pneumatic tire, without the nuisance of air leaks.
Flat free wheels will typically experience temporary flat-spotting even when loaded within the acceptable weight limits. They tend to flat spot immediately, a little more after a few hours, a little more at 24 hours, and not much more after that regardless of time. 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.