Afaik there is no specs listed anywhere..manual only says compare old one to a new one lol
Going from memory a new 2012 belt is 1.22 at the widest point..again that's off the top of my head. Don't recall the width on the inner portion..
funny i was just going to post about my belt... anyway i replaced my belt and after 2100 mi it was a 16th smaller at the skinier part then the new 1... I wonder where i'll gain performance from with the new 1..