It will be quite an experience. As far as tires go i would go with something strong. You need to be very aware and attentive in NYC. I have seen people open car doors and literally get them smashed off. ( last month on broadway & 55th ish). I think it is fun as hell, but i am not wound that tight to begin with. Just make sure that if she will be locking the bike up everything is bolted down. The less quick releases the better.