There are a many possibilities with locks. We will examine the main options

1. Super safe: Thick chain locks such as the Kryptonite NY Lock is the super safe market leader. Use this lock and your bike will be safe, even in NYC.

2. Convenience : Cable locks are light and easy to use, making them super convenient. However they are very easy to cut through. Hence they are only acceptable for short time period use in safe areas.

3. All around lock: Abus folding locks are the best of both worlds. They fold and are fairly light. While being very dificult to cut through.