I don't even own a lock. If I can't take mine in with me - I don't go there. I know that isn't the answer to your question but it's my only way home so I can't afford the even remotest possibility of having it stolen. I have yet to have anyone tell me I Can't take it in somewhere and it's actually been a conversation piece on more than one occasion while I was shopping. I did have 1 friend told that she couldn't bring her bike into Wal-Mart coz they don't have any way of telling if it's hers or if she bought it there so she and I went back there together on our bikes and waltzed right in like we belonged. Guess it was either something that Wal-Mart greeter had made up...or the 2 of us together with our bikes were very intimidating (I thinketh not lol).