I am, unashamedly, a huge gear nerd. I’m also a bit of a perfectionist, and having been cycling around the world for more than three years now I’ve had ample time in the saddle, literally thousands of hours, to puzzle over optimising my bike and gear setup. I’ve changed things up several times over the years, inching closer to what I consider ‘the perfect setup’. Now, finally, I think I’ve got as close as I can to that perfection. There are one or two minor things I might tweak, but after…