Ways not to lock your bike

In Berlin, the second most common type of bike on the road, after the standard European sit-up-and-beg commuter, is the MTB. Really fugly MTBs at that. People of Berlin, what are you thinking? You live in one of the flattest and most cycle-friendly cities in the world!

To be fair, the classic rigid MTB were a great choice for riding around the city once you changed the tyre, the part are easy to acquired, easy to maintenance (unlike those dutch bike when it come to puncture), and fun to ride, they were lighter than dutch bike too;

Incidentally my dutch bike were based off an old 80's rigid MTB geometry.

However, modern MTB are too much for riding on the road with it's suspensions, multiple gears, disc brakes, etc.