My bike has threaded forks. The manufacturer's spec on my bike says it has a 1 1/8 headset. I bought a 1 1/8 headset on ebay. I was under the impression that 1 1/8 headset meant that the diameter of the hole in the head was 1 1/8th inch (28.6mm) Now when I look at the specs on the 1 1/8 headset...