Trailer (10 bolt) Dual Wheels 400-420 Wheel Balancers

The Centramatic 400-420 is a heavy-duty "on-board" balancing solution specifically engineered for trailers with 17.5" dual wheels. Designed to sit between the dual wheels, these balancers provide a permanent, self-adjusting solution to the vibration and heat build-up that often lead to premature trailer tire failure.

Centramatic Dual-Wheel Trailer Balancers (Pair) – P/N 400-420

Fits: 17.5" Wheels | 10-Hole Pattern | 8.75" Bolt Circle

Eliminate the "trailer bounce" and road shock that can damage your trailer's structure and cargo. The Centramatic 400-420 is precision-designed for heavy-duty 17.5" dual-wheel trailer axles, providing a dynamic solution that stabilizes all four tires on the axle simultaneously.

Technical Specifications

• Model #: 400-420

• Vehicle Type: Trailers (Heavy Duty Flatbeds, Lowboys, Horse Trailers)

• Axle Compatibility: Dual Wheel Axles (Order 1 set per axle)

• Wheel Size: 17.5 in.

• Bolt Pattern: 10-Hole

• Bolt Circle: 8.75 in.

• Quantity: Set of 2 (One pair handles a complete dual-wheel axle)

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

The "On-Board" Advantage for Heavy Trailers

Trailer tires are notoriously prone to "flat-spotting" and irregular wear due to long periods of sitting or heavy loading. Centramatic’s patented system uses centrifugal force to shift high-density balancing media (hardened durametal alloy and synthetic fluid) to the exact point of imbalance while you tow.

• Massive Tire Savings: Increases tire longevity by 25%–50%—a significant cost saving for expensive 17.5" commercial-grade trailer tires.

• Lower Operating Temps: Reduces tire heat by 8%–10%, which is critical for preventing blowouts during long-distance hauling in extreme heat.

• Protect Your Cargo: Dramatically reduces the high-frequency vibration that can loosen rivets, stress trailer frames, and cause damage to sensitive cargo or livestock.

• Self-Adjusting: Automatically compensates for mud, ice, or uneven wear patterns at speeds above ~20–22 mph.

Installation & Build Quality

• Maintenance-Free: A sealed, self-contained system—no beads to clog valves and no lead weights to fall off on rough roads.

• Easy Setup: No pre-balancing required. These mount directly between the dual wheels using your existing lugs.

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