I have been building up a 130mm rear spacing road bike for fixed-gear, and was simply planning on getting an IRO drivetrain to start with. But I forgot to consider chainline and things like that and now I'm not so sure about my choice. Chain-line and BB size are things I have trouble understanding, I can't visualize it in my head so it's difficult.

With 130mm rear-spacing, what sort of things should I be thinking about? Should I use road cranks with one chainring to achieve a better chainline? I've read some threads using the search function but like I said, it's mind-bending. The BB is a standard 68mm English thread (It's a GT Strike road bike).

Anyone have any ideas on how I can get a nice balance of chainline with either track or road parts?