Originally Posted by wahoonc

I have ring locks on 4 bikes, two of which has spent much of their life out in the weather. If you lube it occasionally it is a non issue IMHO. If it does get jammed it would be pretty easy to cut with a mini grinder or dremel tool. FWIW my single favorite feature is the key is trapped in the lock while it is open, meaning you cannot ride off and forget your keys at home, which I have done more than once with my U-lock