The U-lock is classics when it comes to securing bikes, and for good reason. Solid materials and no moving parts outside the lock mechanism are an excellent starting point for the strongest resistance possible. Decades of experience with the U-lock have made us experts in combining the most resistant materials with unique technology, and consequently one of the leading U-locks manufacturers. By the way: the police and insurance companies recommend the use of an U-lock.
The Abus Super Ultimate 430 U-lock (290mm) 9"; Yellow/Red has a locking room of 9" x 5" x 3" and is easy to fit around your bike and what you are locking to. Frame mount included. Security rating 13/15.