Fits: 16"–17" Wheels | 5-Hole Pattern | 5.5" Bolt Circle
Eliminate the "trailer shake" that causes loose rivets, cabinet wear, and appliance failure. The 300-355A is specifically engineered for 2-axle (tandem) trailers running 5-lug wheels with a 5.5" bolt circle, providing a permanent solution to vibration.
Model #: 300-355A
Vehicle Type: Tandem Axle Trailers / RVs
Quantity: Set of 4 (Covers both axles)
Wheel Size: 16 in. to 17 in.
Bolt Pattern: 5-Hole
Bolt Circle: 5.5 in.
⚠️ Fitment Note: Due to variances between trailer models, these may not fit all applications. Please verify hub clearance before installation.
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 counteract heavy spots in the tire and wheel assembly.
Protect Your Cargo: Dramatically reduces road vibration, keeping your trailer’s interior and delicate equipment safe from constant jarring.
Maximum Tire Life: Proven to increase tire longevity by 25%–50%—a major saving for high-ply trailer tires.
Lower Operating Temps: Keeps tires 8%–10% cooler, which is critical for preventing blowouts during long hauls in summer heat.
Continuous Adjustment: Automatically compensates for "flat spots" caused by storage or mud/debris stuck in the tread.
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 lugs.
Speed Activated: The balancing media shifts into the correct position at ~20–22 mph, ensuring stability long before you hit highway speeds.
Proudly Made in the USA: Built in Texas and backed by a 5-Year / Unlimited Mileage Warranty.
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