How True Are Your Wheels?

Wheels Can Affect Your Car & Driver's Performance.
July 18, 2023 by
How True Are Your Wheels?
Dan Smith

Wheel trueness is critical in aluminum racing wheels, as it significantly affects the performance, safety, and overall driving experience. Trueness refers to the condition in which the wheel is perfectly round. It has no lateral or radial runout, meaning it doesn't wobble or deviate from its proper circular shape when rotating.

Here are some reasons why wheel trueness is crucial for aluminum racing wheels:

  1. Performance: In racing, every fraction of a second counts. A true wheel ensures consistent contact between the tire and the road surface, allowing the vehicle to maintain optimal grip and traction during cornering and acceleration. Any wobbling or deviation can lead to uneven tire wear and compromised handling, ultimately affecting lap times and performance on the track.
  2. Stability: A true wheel helps maintain stability and predictability while driving at high speeds. When the wheels are perfectly round, there is minimal vibration, reducing the likelihood of steering wheel shimmy or instability, which could otherwise lead to unpredictable behavior while racing.
  3. Brake Performance: Brake performance is closely linked to wheel trueness. A true wheel ensures uniform contact between the brake pads and the brake disc (rotor), resulting in even braking force distribution and more effective braking performance. Any imbalance caused by wheel runout can lead to uneven brake pad wear and decreased braking efficiency.
  4. Tire Life and Wear: A true wheel promotes even tire wear across the tire's surface, extending its lifespan and maintaining optimal grip throughout its life. If the wheel is not true, certain areas of the tire may experience more wear, leading to premature tire replacement and added expenses.
  5. Safety: Safety is paramount in racing, and a true wheel is crucial to prevent potential accidents caused by steering instability or loss of control. Wheels with excessive runout can cause the vehicle to pull to one side, leading to hazardous situations, especially during high-speed racing.
  6. Suspension Performance: Wheel trueness also impacts the suspension system's performance. A true wheel allows the suspension components to work as intended, providing better control and feedback to the driver.
  7. Confidence: Racing drivers need to have confidence in their equipment. Knowing that their aluminum racing wheels are true and reliable allows them to focus on pushing the limits of their driving skills without worrying about mechanical issues affecting their performance.

To maintain wheel trueness, regular inspections and maintenance are essential. Racing teams and drivers often check the wheels for runout and address any issues promptly by balancing or, if necessary, replacing the wheel to ensure peak performance and safety on the racetrack.