Product Description
Load Wheel
Frequently Asked Questions
Q: What is the load capacity of SU 375 wheels compared to SU 359?
A: SU 375 wheels are rated for 10,500 pounds per wheel versus 9,000 pounds for SU 359. The difference comes from a larger tire diameter (8.5 inches versus 7.5 inches) and thicker rubber compound. Do not use SU 375 on trucks designed for SU 359 as it creates wheel well clearance issues and uneven wear.
Q: Can SU 375 wheels be installed without hub or bearing replacement?
A: Yes, if your existing hub has a matching bolt pattern and 2-inch axle bore. SU 375 wheels are pressed onto standard hubs from most three-wheel truck manufacturers. Verify bolt pattern (typically 6.5 inches or 8 inches) before purchase. Installation is bolt-on and takes 10 minutes per wheel.
Q: Why would I choose SU 375 wheels for rear axles but not front?
A: Rear wheels experience lower steering stress and deeper tread wear is acceptable. Larger SU 375 wheels on rear increase ground clearance and reduce turning radius friction. However, front steering wheels must be smaller and lighter for responsive steering control. Most three-wheel trucks use SU 359 or SU 351-XL-A in front and SU 375 in rear for balanced performance.
Q: What tread pattern does SU 375 use and is it for indoor or outdoor floors?
A: SU 375 features a shallow, flat tread pattern designed for smooth indoor warehouse floors. The tread provides traction on clean concrete but offers minimal grip on oil, water, or outdoor surfaces. For wet or textured floors, upgrade to specialized grip-rated wheels at purchase time.
Q: How do I know if SU 375 wheels are worn and need replacement?
A: Measure tread depth with a caliper or gauge and replace when depth falls below 0.25 inches. Visual signs include flat spots, severe color fading to light gray, sidewall cracks, or chunks missing from the tread. Worn wheels reduce traction and braking efficiency. Replace as a set (both rear wheels) to maintain balance.
Q: What is the temperature operating range for SU 375 wheels?
A: SU 375 wheels operate safely between 40 degrees Fahrenheit and 130 degrees Fahrenheit. Cold storage below 40 degrees makes rubber hard and brittle; allow wheels to warm to room temperature before use. Heat above 130 degrees (from extended high-speed operation or direct sunlight) accelerates rubber degradation and reduces service life by 20 to 30 percent.