St. Peters Road Force Tire Balancing | GSP9700 Wheel Balancer

WHEEL BALANCE IS ONLY PART OF THE SOLUTION…and Axleboy Automotive has you covered with a Hunter GSP9700 Wheel Balancer.

Road Force Balancing
Contact us today for your Road Force Wheel Balance!


At 60 miles per hour, an average size tire rotates 850 times per minute. At this speed, even slight variations in balance, sidewall stiffness or roundness can cause the wheel assembly to slam down on the pavement approximately 14 times a second.

The ultra-sensitive road feel of today’s vehicles gives drivers a “hands-on” detection of vibration that should signal a warning of potential problems. When left unchecked, excessive wheel vibration can result in expensive damages and cause unsafe driving conditions such as:

  • Excessive Tire Wear and Cupping of the Tread
  • Damage to Suspension and Steering Components
  • Unsafe Steering and Handling
  • Increased Stopping Distances

What Causes Excessive Wheel Vibration?

Wheels Out of Balance
Static Tire Balance | St. Charles Road Force Balance
Static wheel balance measures only “up and down.”
Dynamic Wheel Balance | St. Peters Road Force Balancing
Dynamic wheel balance also measures from “side to side.”

Static wheel balancing uses a single weight plane and only addresses “up-and-down” imbalance. This is simply not adequate for today’s wheel vibration sensitive vehicles.

Dynamic wheel balancing uses two weight planes. This eliminates “up-and-down” and “side-to-side” imbalance. We recommend that a Dynamic, two plane wheel balance should always be requested, even on custom wheels, when hidden weights are required.

Wheel Force Variation
Out of round tire | St. Charles Road Force Balancing
An out of round tire (runout) causes wheel vibration.

A stiff spot in either tread or sidewall hitting the pavement causes vibration. Even a perfectly balanced tire can still vibrate due to Force Variation.  Wheel Force Variation is most frequently due to “wheel runout” or uneven tread or sidewall stiffness in the tire. Runout occurs when a tire or rim is not perfectly round when rolling; frequent causes are a bent rim or uneven tire wear. Uneven tread or sidewall stiffness can be found in new or worn tires. Tires by design are never uniformly flexible throughout nor are they perfectly round. And no two tires are exactly alike in these characteristics.
How Wheel Force Variation is Corrected
St. Peters Road Force Tire Balancing
OEM Match Mounting matches a high point or stiff spot on a tire…
St. Peters Road Force Tire Balancing
with the low spot on the rim, for maximum roundness.
  1. Match mounting a tire and rim by matching the high point or stiff spot in the tire with the lowest spot in the rim, can make the wheel “round when rolling.”
  2. In some cases a wheel is so out of round it should be replaced.
  3. In some cases a tire with excessive Force Variation is defective.

Tire Pressure and Wheel Alignment

Improper tire pressures and misalignment can cause irregular tire wear, which creates and amplifies imbalance, resulting in wheel vibration.  The most effective way to reduce or eliminate these types of vibration are to 1) check tire pressure at least once a month 2) rotate your tires every 5,000-8,000 miles and 3) get your vehicle aligned at least annually.  We recommend consulting your owner’s manual and consulting with a trusted automotive professional.

Other Hidden Causes of Wheel Vibration

  • Wheel to axle mounting error
  • Brake component wear or failure
  • Drive train or engine component wear or failure
  • Vehicle component characteristics

Our knowledgeable technicians have been properly trained to diagnose these problems and use state of the art equipment to provide long lasting, effective solutions for your vehicle.  The experts at Axleboy use a Hunter GSP9700 Vibration Control System.

Check out the video below for more information about Road Force Balancing