3 Axle Trailer (8 bolt) 16-17" Wheels 9/16"-14mm studs 300-318A6 Wheel Balancers

Centramatic 3-Axle Trailer Wheel Balancers (Set of 6) – P/N 300-318A6

Fits: 16"–17" Wheels | 8-Hole Pattern | 6.5" Bolt Circle | 9/16" or 14mm Studs

Stop the "triple-axle bounce" that causes premature tire wear and internal trailer damage. The Centramatic 300-318A6 provides a complete, dynamic balancing solution for your heavy-duty triple-axle toy hauler, flatbed, or horse trailer. By balancing the entire wheel assembly in real-time, these units ensure your trailer pulls smoother and your tires last longer.

Technical Specifications

• Model #: 300-318A6

• Vehicle Type: Triple-Axle Trailers (6K to 8K Axles)

• Quantity: Full Set of 6 (Covers all three axles)

• Wheel Size: 16 in. to 17 in.

• Bolt Pattern: 8-Hole

• Bolt Circle: 6.5 in.

• Stud Size: Specifically for 9/16" or 14mm studs

• ⚠️ Fitment Note: Due to variances between trailer models, these may not fit all applications. Please verify hub and brake drum clearance before installation.

The "On-Board" Advantage for Triple-Axles

Centramatic's patented technology features a permanently sealed ring filled with hardened durametal alloy and proprietary synthetic fluid. As you tow, centrifugal force automatically shifts this media to the exact point needed to bring the assembly into perfect equilibrium.

• Protect Your Investment: Dramatically reduces road vibration, preventing loose rivets, cracked welds, and appliance failure in large RVs.

• Maximum Tire Life: Proven to increase tire longevity by 25%–50%—a massive cost saving for 6-tire setups running expensive high-load tires.

• Lower Operating Temps: Keeps tires 8%–10% cooler, which is critical for preventing blowouts during long-distance hauling in high heat.

• Self-Adjusting: Automatically compensates for "flat spots" from long-term storage or mud and debris stuck in the rims.

Installation & Build Quality

• Maintenance-Free: A sealed, self-contained system with zero upkeep required—just install and tow.

• Easy Setup: No pre-balancing needed. These mount directly behind the wheel on the hub using your existing 9/16" or 14mm studs.

• Speed Activated: The balancing media shifts into the correct position at ~20–22 mph, providing stability long before you reach highway speeds.

• Made in the USA: Built in Texas and backed by a 5-Year / Unlimited Mileage Warranty.