Regarding the Nylabone Galileo?

I picked up a wolf size Galileo for my 50lb power chewer. The guidelines that come with the bone indicate that the wolf size should be good for dogs up to 35lbs. Do I need to worry about her cracking teeth on too small of a Nylabone, or is it simply an issue of wear on the toy? I gave her the toy before reading the guidelines, so I cannot return it, and I am therefore inclined to allow her to play with it until it is worn to an unusable state. Please advise.