I there a ratio or a chart that I can download that will tell me how long the threaded fork tube needs to be for the frame. I bought a bigger frame because my other frame was a little small. I did not get the matching forks with the frame. I know the diameter is not in question. When the cups, bearings are installed is there a length that I need to have sticking out for the remaining hardware? Will thread less forks convert for my older frame.