Review on Optimized Chainrings for Origin8 BMX, Singlespeed, and Fixie Bicycles by Damon Atonyo

While screwing the holes in the 130bcd, I noticed that one of the holes didn't line up with my spider's "legs". After lubricating my elbow a bit, I managed to insert the bolt. Then, as I turned the cranks, I noticed my chain loosening and tightening oscillatingly. I then discovered that these holes were not perfectly aligned. This made chain tensioning a huge confusing headache and it wasn't until today, a week later, that I found the answer to all this confusion. Everything else worked fine, but be careful, 130bcd holes are disabled.