Here is a link that will give you info on Rottweilers.

http://www.google.ca/url?sa=t&source=web&cd=6&ved=0CCcQFjAF&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FRottwei ler&rct=j&q=German%20rottweiler&ei=Zc_MTPeZDMfFnAfE2o3lDw&usg=AFQjCNHqiA_LyxSl0uL4Vl6TT0dfg9Jl0Q&cad=rja

The info on weight can be found under the "size" category.