Well, this should be a no brainer. Secure your prized possession with a bike lock! You've spent hundreds, if not thousands on your bike, the last thing you need is for some low-life to steal your beloved bicycle. This 4-foot lock will secure your bike to pretty much anything grounded. This bike lock features reinforced steel measuring 12mm thick. Includes 2 keys and will mount to any part of your bike! Fits 1.1-1.5" tubing.