Besides yourself and the bicycle, without which you can't do a bicycle tour, the only things you absolutely need are a cool head, decent coping skills, and a positive attitude.
Everything else is only about varying degrees of comfort.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.