I am familiar with Campy and Cane Creek parts in relation to Road bikes. But, what does 45/45 mean regarding campy style integrated headsets for BMX? I also know they make a Cane Creek specific headset, size 36/45 for BMX. Dans Comp sells both kinds. I am assuming these numbers are a measurement for the races, in which the bearings are placed. Also, how do I measure the headtube races to ensure I buy the correct integrated headset? I recently purchased an older Mosh frame from Ebay. The frame uses a integrated headset. I need help determining which headset to buy. Thanks