I would. Maybe ask if you can keep it inside if you put down a couple of mats. Get some of those cheap door mats where the wheels will go and just carry the bike in and set it down. Either that, or don't tell your landlord. How often does he come in your apartment unannounced? If I remember correctly, he has to give you 24 hours notice, by law, unless it's an emergency (i.e., there's a flood, fire, etc.). And in that case, a bike would be the least of his worries.