Product Description
Industrial-grade press-on rubber drive tire with steel hub, compatible with Superior brand electric lift trucks, featuring a 9 inch diameter, 5 inch tread width, and 5 inch hub bore. Designed for optimized traction, stability, and non-marking indoor application.
Specifications: 9.000 inch diameter x 5.000 inch width (9.000" x 5.000" | 9 x 5 wheel | 9 x 5 | 228.60mm x 127.00mm)
Specifications
Material & Construction
| Tire Material | Industrial-grade rubber compound |
| Hub Material | Carbon steel, machined finish |
| Hardness | Shore A 85 ±5 |
Part Numbers
| Manufacturer Part Number | SU 9 X 5 X 5-SF-R-A |
| Cross-Reference Part Numbers | Superior SU9 X 5 X 5-SF-R-A, SU9 X 5 X 5SFRA |
| OEM Part Number | SU 9 X 5 X 5-SF-R-A |
Wheel Specifications
| Outside Diameter (in) | 9.000 |
| Width (in) | 5.000 |
| Outside Diameter (mm) | 228.60 |
| Width (mm) | 127.00 |
| Drive Tire Profile | Smooth Flat |
| Material | Rubber |
Frequently Asked Questions
Q: What does the A suffix mean on the SU 9 X 5 X 5-SF-R-A, and what comes in the package?
A: The A suffix denotes assembly with hub included. The SU 9 X 5 X 5-SF-R-A is a complete pre-assembled steer wheel: industrial-grade rubber tire bonded and press-fitted to a carbon steel hub. It arrives ready to install directly on the truck steering axle without requiring a press or additional assembly. The base part SU 9 x 5 x 5-SF-R is the tire only and requires separate pressing onto a hub. Order the SF-R-A if you need the complete wheel ready to go.
Q: What hub material and bore size does the SU 9 X 5 X 5-SF-R-A include?
A: The hub is carbon steel with a machined finish and 5-inch bore diameter. Steel provides strength, corrosion resistance, and precise concentricity for smooth steering control. The machined bore accommodates standard tapered roller bearings used on most lift trucks. Hub material is not changeable on this assembly. If your truck requires a different hub material (such as aluminum for weight reduction or bronze for specific applications), contact technical support for custom options.
Q: Can I remove the rubber tire from the SU 9 X 5 X 5-SF-R-A assembly and remount it on a different hub?
A: No. The rubber tire is permanently bonded to the steel hub using adhesive and thermal press manufacturing. Separating the two will destroy both components. Attempting to remove or re-press the tire will result in torn rubber, cracked compound, and an unsafe wheel assembly. When the tire wears out, replace the entire SU 9 X 5 X 5-SF-R-A assembly as a single unit.
Q: What is the proper installation procedure for the SU 9 X 5 X 5-SF-R-A assembly onto the steering axle?
A: Install the assembly onto the steering axle in these steps: Clean the axle bore and check bearing condition. Slide the SU 9 X 5 X 5-SF-R-A assembly onto the axle. Install the tapered roller bearing onto the hub bore. Install the snap ring or lock clip to secure the bearing. Torque the axle nut to the truck manufacturer specification (typically 60 to 120 foot-pounds; check your specific truck manual). Verify the wheel rotates freely without binding. Do not over-torque, as this damages the bearing and accelerates tire failure.
Q: What is the maximum load and speed rating for the SU 9 X 5 X 5-SF-R-A assembly?
A: The steer wheel load rating is approximately 1200 to 1400 pounds per wheel depending on truck suspension design. Steer wheels typically carry less load than drive wheels. Maximum safe operating speed is 12 mph continuous; exceeding this stresses the steering system and accelerates tire wear. For smooth handling and extended tire life, maintain normal warehouse operating speed (6 to 10 mph) during turns and steering maneuvers. Always follow the truck manufacturer speed recommendations for your specific model.
Q: What is the expected service life of the SU 9 X 5 X 5-SF-R-A, and when should replacement be scheduled?
A: Steer tires typically last 24 to 40 months in standard warehouse operation (16-hour daily use). Steer tires generally outlast drive tires because they carry less load and experience less acceleration and braking stress. Monitor tire thickness every 6 months and replace when thickness falls below 0.375 inch or visible cracking develops. If the truck develops steering pull, requires excessive steering input, or develops uneven wear patterns, replace the assembly immediately. Rubber compound hardens over time; if the assembly is over 5 years old, replace it even with minimal visible wear to prevent in-service failure.
