The NY mini Forgetaboutit will not go between the rear wheel seat tube and a sign post, at least not with my bike. Maybe if your rear wheel sits really close to the seat tube you might get it to work. Currently I lock my back wheel to my frame using that lock and I do the same with the front wheel and frame with a second one. I then use a Kryptonite Evolution to lock to the bike rack as it has more length. I think Veganbikes made a good suggestion using the Abus Bordo lock as it has great protection and is more versatile.