ATV Tire and Running Gear Maintenance — From Tire Pressure to Bearings

The tires and running gear of an ATV are the parts that directly contact the ground, determining safety, handling, and ride comfort. Yet many owners focus only on engine maintenance while neglecting regular inspection of tires and suspension systems. According to industry maintenance guides, regular inspection and upkeep of the ATV running gear not only affect riding safety but also directly influence the overall service life of the vehicle.

1. Tire Pressure — A Pre-Ride Check Every Time

Correct tire pressure is the foundation of traction, handling, and puncture prevention. Measure tire pressure before every ride and adjust to the values recommended in the owner‘s manual.

Tire Pressure Check Essentials:

When tire pressure is too low, heat buildup increases, raising the risk of blowouts, while rolling resistance increases, reducing fuel efficiency. When pressure is too high, the contact patch shrinks, significantly reducing traction on soft terrain such as mud or sand.

2. ATV Wheel Sizes and Reading Tire Markings

ATV wheel dimensions follow a standardized measurement system, typically expressed as “diameter × width” in inches. For example, a tire or wheel marked “25×8‑12” means:

• 25 = Tire outer diameter (inches)

• 8 = Tire width (inches)

• 12 = Rim diameter (inches)

Understanding this marking helps you select the correct size when replacing tires. Steel wheels are superior to aluminum alloy wheels in impact resistance, durability and repairability, making them the preferred choice for off‑road use. Aluminum alloy wheels are lighter but can crack under extreme impacts.

3. Wheel Bearings — A Critical but Often Overlooked Component

Wheel bearings are the core components that support wheel rotation in the ATV running gear. The BRS Rim maintenance guide notes that most ATV bearings require servicing every 50‑100 hours of operation. Vehicles used frequently, in water, or in muddy conditions need more frequent inspection and lubrication.

Three‑step bearing maintenance:

• ① Clean — Remove the wheel and bearing, use degreaser to remove old grease and dirt

• ② Inspect — Check for pitting, discoloration, or rough feeling when rotating. Replace immediately if any of these are present

• ③ Repack with grease — Fill the bearing cavity about 2/3 full with high‑temperature grease, reinstall, and tighten the spindle nut to manufacturer‘s recommended torque

If the bearing makes hissing, grinding, or clunking sounds when rotating, it may have failed and should be replaced promptly to avoid damage to the wheel hub or axle.

4. Front Wheel Alignment (Toe Adjustment)

Incorrect front wheel alignment not only causes uneven tire wear but also affects vehicle handling. Professional front alignment steps:

1. Place the vehicle on level ground. Measure the distance between the front tire centerlines at the front and rear of the tires

2. Loosen the tie-rod lock nuts

3. Adjust both tie rods equally, turning 1/4 turn at a time

4. Measure repeatedly until reaching the toe specification — typically about 1/8 to 1/4 inch toe‑in

5. Tighten the lock nuts to the manufacturer‘s recommended torque

If the vehicle pulls to one side while driving, or if you notice irregular tire wear patterns, the front alignment needs adjustment.

5. Four Main ATV Tire Types and Applications

On ice or snow, consider switching to “winter tires” (deeper tread, softer rubber, better grip) or install tire chains (ensure chain size matches tire and avoid scratching wheels). Reduce speed (not exceeding 40 km/h), maintain extra distance, and steer gently.

6. Maintenance Schedule Summary

Yongkang Haohao Vehicle CO.,LTD. offers a full range of ATVs equipped with durable steel wheels and high‑quality tire systems. For genuine tires, wheels, bearing components, or running gear service, please contact us through our official website.

More information: Visit   https://www.shsportmotor.com   for more product details and maintenance supplies.