The original Honda piece makes it seem like the size correlates to the resonant frequency. https://global.honda/en/tech/Noise-reducing_Wheels/ https://global.h

The original Honda piece makes it seem like the size correlates to the resonant frequency. https://global.honda/en/tech/Noise-reducing_Wheels/ https://global.honda/en/tech/Noise-reducing_Wheels/ > As the tire size is known, pipe resonance frequency can be determined. By generating sound that cancels out that frequency, pipe resonance can be suppressed.