The mounting bracket that comes with this lock is based on tubing no bigger than a seat post. Most modern bikes that use alloys for the frame have very large diameter tubes. This bracket will not mount on those tube.  The only option is to place it on your seat post.  In my case the post is not extended out enough to accommodate the bracket and lock.  For me there are no options to carry the lock on the mountain bike I have.  The lock more than likely would work on securing the bike, with without a way to carry  it on the bike, it doesn't do much good.