These strings us Dacron string material (B-50). The strand count of our replacement strings is 14 stands, and that would be a good amount for your 49# bow. I would use the nylon #4 serving material myself, but you can experiment with other brands as you like.
Fast flight string.
I have seen a couple of my bows which have been using fast flight for a few years and they showed only a little extra wear . The tips are reinforced but with wood pegs with the grain set at 90degrees.
My gut feeling is I do not trust the wood peg to be proof against the extra wear the fast flight string applies. Even though evidence shows they stand up to it very well.
Answered on 3/12/2012 by Johnathan Karch from 3Rivers Archery