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Why?
To me they just don't go well with the rest -
aesthetically, as the whole bike is looking quite "firm" and ready-for-action, and those tyres look more like a leisure-mode / rubber boat (they look like inner tubes, basically).
From a functional point of view, again the whole bike looks like it's ready for some serious trips, yet the botox wheels look like they would explode if a sharp-ish stick would touch a sidewall.
looks fresh but those botox wheels are a bit daft