A long-term user's observation about the Kryptonite M18 New York Lock. I've had mine for about 7 years now. I lock my bike outside at work and leave the lock in situ, so it's spent most of that time outdoors. It's still as secure as ever, but it's gone through about 3 or 4 maintenance overhauls where I have had to remove a ton of rust each time. The main locking mechanism is a steel cylinder in a steel sleeve, and water gets between the two and does its evil work there. The mechanism itself doesn't seem to be affected. I've just completed another overhaul and am about to re-assemble and regrease. I was wondering if anyone with the Abus Granit Extreme, which I am likely to upgrade to at some point, has similar rust issues.