I know on Jason's site it says 3 inches shorter and a 55 inch string for a 58 inch bow. I ordered a 55 inch B55 and it was way short before it ever stretched. I twisted the heck out of it and got it to brace but I am going to have to order another.
55"is what I have always ordered. Better measure the one you received. I have ordered from many string makers. Brace height should be about 7 3/8". I have always used D97.