Product Description
SU S666-XL-A is a polyurethane load wheel assembly designed for electric lift trucks, utilizing Cushothane XL compound for maximum cut and tear resistance. It features proprietary XL3 bonding, a 6-inch by 4-inch smooth tread, and high-strength steel hub construction. Cross-reference compatible with L500666R, S666XL, SU 666-XL-A, and other OEMs. Suitable for demanding mid-market material handling environments.
Specifications: 6.000 inch diameter x 4.000 inch width (6.000" x 4.000" | 6 x 4 wheel | 6 x 4 | 152.40mm x 101.60mm)
Specifications
Material
| Hub Material | High strength steel |
Part Numbers
| Manufacturer Part Number | SU S666-XL-A |
| OEM Part Number | S666-XL |
| Cross-Reference Part Numbers | S666XL, L500666R, SU 666-XL-A, SUS666-XL-A |
Wheel Dimensions
| Material | Cushothane EZ |
| Outside Diameter | 6 |
| Inside Diameter | 2.5 |
| Width Side to Side | 4 |
| Tread Profile | Angle |
| Bore Depth | 0.68 |
| Hub Width | 4 |
| Bore Outside Diameter | 2.8341 |
Frequently Asked Questions
Q: What is the difference between SU S666-XL and SU S666-XL-A?
A: The SU S666-XL is a wheel only, while SU S666-XL-A is a complete wheel assembly that includes the hub. The SU S666-XL-A features a high-strength steel hub and Cushothane XL compound bonded with proprietary XL3 bonding technology for superior cut and tear resistance. Order the assembly (SU S666-XL-A) if you need the complete ready-to-install unit, or the wheel (SU S666-XL) if you are replacing the tread only.
Q: What are the cross-reference part numbers for SU S666-XL-A?
A: SU S666-XL-A is cross-referenced with L500666R, S666XL, SU 666-XL-A, and SUS666-XL-A. Always verify the bore size and overall dimensions match your application before substituting. Some cross-reference numbers may have minor dimensional or material variations, so confirm fitment with the manufacturer if exact compatibility is critical.
Q: How long does the Cushothane XL compound last on the SU S666-XL-A?
A: Cushothane XL is engineered for demanding mid-market material handling environments with heavy use. Expected lifespan is typically 18 to 36 months depending on floor type, load weight, and daily duty cycle. The XL3 bonding provides enhanced adhesion between tread and hub, reducing delamination risk compared to standard bonding. Clean floors and moderate speeds extend wheel life; rough concrete or high-speed pushing reduces lifespan.
Q: Does the SU S666-XL-A assembly require special tools to install?
A: The SU S666-XL-A is a wheel assembly with hub attached, so installation depends on how your lift truck axle is configured. If your truck uses a press-fit or bolt-on hub system, you may need a wheel puller or hydraulic press to remove the old assembly and install the new one. Do not attempt to press or pull the assembly by the polyurethane tread; always support the hub. Refer to your truck service manual for axle specifications and contact the manufacturer if you are unsure about removal or installation procedures.
Q: Is the SU S666-XL-A suitable for my warehouse floor?
A: The SU S666-XL-A is designed for industrial warehouse and mid-market material handling use. It performs well on concrete, epoxy, and sealed floors. If your floor is extremely rough, acidic, oily, or chemical-treated, confirm material compatibility with the supplier before ordering. The high-strength steel hub resists corrosion in standard indoor conditions but may require protection in wet or outdoor environments.