I think Ron is definitely right Rasbrito !
If you can have Nike repair it, that would
be the way to go. Have been looking around for a place that sells replacemet straps
and so far haven't seen any, so going directly to Nike sounds GREAT ! Here is a link
for you, and if you go to the " What should I do if my watch strap breaks ? "
it basically recommends contacting a service center as well. ..Good luck to you sir ! http://www.nikewatchrepair.com/faq.htm