I tried using the same bike on an indoor trainer but it ended up more trouble than its worth. Of course here in Central Texas good ridding weather is only a few days away any time of the year. If I was living up north where I had to go longer times without an outside ride I would certainly consider setting a a bike just for indoor riding...
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No matter where you're at... There you are... Δf:=f(1/2)-f(-1/2)