If the wheel hub is bigger than the vehicle's axle, a centering ring is used to fill the gap and secure the wheel. Even if the gap is very small (7-15 mm), not putting centering rings has a direct impact on the vehicle's performance (except for trucks and SUVs*). Without a centering wheel, strong vibrations could occur in the vehicle and on the steering wheel.
*Special cases of trucks and SUVs
Most trucks and SUVs have 6 or 8 studs, making it easier to install the wheels and perfectly center them on the wheel hub. Therefore, even without a centering ring, no vibrations should occur.
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