Product Description
The GW 9143-A-SG polyurethane caster wheel assembly is specifically designed for electric lift truck applications, providing durability and efficiency. This caster features a 4 x 2.5 inch Durarun wheel with a 95A durometer rating, ensuring optimal performance in demanding environments.
Specifications: 4.000 inch diameter x 2.500 inch width (4.000" x 2.500" | 4 x 2.5 wheel | 4 x 2-1/2 | 101.60mm x 63.50mm) | Bearing ID: 25mm (0.984 inch bore | 25.000mm ID)
• Integrated string guards for enhanced protection
• Precision sealed bearings for smooth operation
• Center swivel configuration for improved maneuverability
• Factory-assembled with mounting hardware for easy installation
This caster wheel assembly is an ideal direct replacement for electric lift trucks, ensuring seamless integration and reliable performance.
Specifications
Material & Construction
| Wheel Material | Polyurethane ( compound) |
| Durometer Hardness | 95A Shore hardness rating |
Part Numbers & Compatibility
| Primary Part Number | GW 9143-A-SG |
| Cross-Reference Part Numbers | GW9143-A-SG, GP 9143-A-SG, GW9143ASG, GP 9143ASG, 9143ASG |
Wheel Dimensions
| Material | |
| Outside Diameter | 4 |
| Width Side to Side | 2.5 |
Frequently Asked Questions
Q: What are string guards on this caster wheel, and why do they matter?
A: String guards are wire or plastic protective rings integrated into the wheel assembly to prevent rope, twine, straps, or fabric from wrapping around the axle during operation. They are essential in environments where the truck operates near pallets wrapped with plastic film, netting, or strapping material. Without guards, wrapped material can lock the wheel, stalling the truck or causing bearing damage. SG designation specifically indicates this safety feature is included.
Q: Is GW 9143-A-SG compatible with trucks that originally used GW 9143-A or GW 9143-A-R?
A: Yes. GW 9143-A-SG has identical dimensions (4 x 2.5 inches, 25mm bore) and bearing configuration to GW 9143-A and GW 9143-A-R. The only difference is the added string guard. Install as a plug-and-play replacement with no modifications needed. However, if your truck has guard cutouts or brackets, verify the SG guard does not interfere with truck geometry before installation. Typical clearance is 0.250 inch minimum.
Q: Can I use GW 9143-A-SG in a warehouse without wrapped pallets or strapping?
A: Yes. String guards do not negatively affect performance on clean floors. They add minimal weight (under 2 ounces per wheel) and do not reduce load capacity or speed. The guards are passive and do not create drag or friction. Use GW 9143-A-SG in any environment; the guards simply provide protection if debris is encountered. There is no performance penalty for non-wrapped pallet operations.
Q: What is the maintenance requirement for integrated string guards?
A: Inspect guards weekly for tangles or wrapped debris. Clean by hand or compressed air to remove dirt and fibers. If a guard becomes bent or cracked, replace the entire wheel assembly; individual guard replacement is not practical. Guards require no lubrication or adjustment. Annual inspection ensures the guard wire or plastic remains intact and free of corrosion. Replace GW 9143-A-SG if guard separation from the wheel exceeds 0.100 inch.
Q: Are GW 9143-A-SG and GP 9143-A-SG interchangeable cross-brand?
A: Yes. GW 9143-A-SG, GP 9143-A-SG, GW9143ASG, GP 9143ASG, and 9143ASG are all equivalent part numbers from different suppliers. All have identical 4 x 2.5 inch dimensions, 25mm bore, 95A Durarun tread, and integrated string guards. Cross-brand installation is acceptable without retooling or truck modification. Verify bore size and guard clearance before installation.
Q: What is the lifespan of GW 9143-A-SG under heavy use with strapped pallets?
A: Under continuous-duty operation with wrapped or strapped pallets, expect 18-24 months before tread wear or guard damage requires replacement. The 95A Durarun tread wears at the same rate as unguarded versions, approximately 0.025 inch per 100 hours of operation. String guards add 6-12 months of operational life expectancy by preventing debris-induced bearing damage. Replace every 12 months if operating in extremely high-string environments (heavy wrapping, daily strap contact).