By: Superior Tire  11-11-2011
Keywords: Pallet Truck, Height Adjustment

Superior Tire & Rubber Corp. manufactures the patented STR Caster series of shock absorbing, stabilizer casters for all makes of pallet jacks and forklifts.  The caster uses an innovative polyurethane spring to give better cornering and smoother ride over dock boards. Superior also offers heavy duty swivel and rigid casters for powered industrial equipment.


The aftermarket STR caster offers a linear deflection up to 2" of travel at 1,400 lbs. of load.  This prevents the bottoming out and the rough ride found with casters using mechanical springs.  The polyurethane spring is designed to provide millions of cycles before wearing, avoiding softening found in steel spring designs.  The 4" O.D. x 2.5" wide poly load wheel was chosen for its high cut and tear resistance, ease of swiveling and high carrying capacity. Custom OEM load vs deflection designs available.

For after-market users, the casters' 3 adjustable axle settings with a fine height adjustment screw allow for field modification without shimming or taking the caster off truck.  The four STR caster models, which cover all makes of pallet jacks, use common components allowing the dealer to service all models of trucks with just a change of side plates.

Constructed to eliminate steel bending and minimize welding in the frame, finite element analysis and extensive field trials have confirmed that the .25" steel design provides a mechanical strength equal to the .375" steel casters currently on the market.

The caster comes standard chromed with sealed bearings and a string guard.  The best part?  Because Superior makes all the casters' components (except the bearings), the caster is the lowest priced caster in its class while maintaining heavy duty performance.

STR Caster

Used as a stabilizer caster on electric trucks and in other tough industrial applications. View our cross-reference for popular electric rider pallet truck casters.

Keywords: Height Adjustment, Pallet Truck,

Other products and services from Superior Tire


Superior Tire Products

Products include wear parts for the mining industry including hose reels, drag shoes and flights, drag shoes, flights and transitions for sweepers, snow plow blades and spinners, cutting backboards and vibration control components. Superior Load Protectors provide a cushioned non-slip surface between product and steel fork, eliminating expensive scratching, chipping, marring, scuffing and general damage of product caused by steel forks.


Load Wheels

As one of the largest processors of cast polyurethane in the U.S., Superior's extensive library of prepolymer backbone and curatives allow us to have an arsenal of compound choices. In addition to the brands above, Superior manufactures wheels from PPDI and a variety of curatives to offer our customers specialty compounds when all other solutions fail.