• A really strong Ulock like the Hiplok D1000, or 13mm+ chain (it should be resistant to portable angle grinders)
• A light vest or harness with multiple reflectors and LEDs, like the Noxgear Tracer vests. Typically, runners use these, but they help make you visible even if you wear dark clothing, which I recommend against anyways. You must be visible to other bikes, pedestrians, and most importantly, cars.
• A cargo rack and waterproof panniers. This makes it significantly easier to carry heavy groceries, locks, waterproof and insulating layers, laptops, beach gear, or whatever else you are carrying. I have two 44L ones, they are about as big as you can get without getting cumbersome. Plus, the ones I have can be rolled up and stuck into the other one when not in use (ortlieb back roller is what I use).
I’d say the real ones are:
• A really strong Ulock like the Hiplok D1000, or 13mm+ chain (it should be resistant to portable angle grinders)
• A light vest or harness with multiple reflectors and LEDs, like the Noxgear Tracer vests. Typically, runners use these, but they help make you visible even if you wear dark clothing, which I recommend against anyways. You must be visible to other bikes, pedestrians, and most importantly, cars.
• A cargo rack and waterproof panniers. This makes it significantly easier to carry heavy groceries, locks, waterproof and insulating layers, laptops, beach gear, or whatever else you are carrying. I have two 44L ones, they are about as big as you can get without getting cumbersome. Plus, the ones I have can be rolled up and stuck into the other one when not in use (ortlieb back roller is what I use).
ABUS, Skunklock, and Litelock also make good Ulocks.
My personal favorite is the Skunklock Chemical but it’s very heavy. Better for ebikes or maybe moto.