By law it is not required to have two locks on your bike. Yet for the bike to be insured during the leasing period at least one ART-2 lock or higher is required. If you want to improve the security of your bike, we advise you to buy a second lock with, for example, an ART-2, ART-3, ART-4 or ART-5 label. The last two are also used for scooters, mopeds and motorcycles.