Originally Posted by Happy Feet

The formula is correct but the explanation is a little convoluted. "n" can't represent two things in the same formula.

Let n represent the number of bicycles you need. That is all. The number of bikes you need is equal to the number of bikes you need +1. Even if you eliminate n from both sides of the equation (which you wouldn't because then there is no equation) you still have +1.

This is the formula you run when considering whether you should buy another bike. It also works when the wife looks in the garage and asks "How many bikes do you need?" I usually remain silent but secretly run the formula through my head.

But I think this whole discussion is a little pointless. What one really needs is a spare rider. For those days when you feel you should ride but want to waffle. Just kick the spare out of bed and say "go ride". Clones would work I think. A twin if you should be so lucky.