My titanium Holland is my main go-to road bike.
I ride a tandem with the wife.
I take a folder on our vacations.
And I have a backup road bike that I ride if it's raining or if the Holland is out of commission.
The other three bikes are rarely used and I just consider them 'guest' bikes for when company wants to take a little spin around the neighborhood.
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Two wheels good. Four wheels bad.