Quick releases?
 

I just started riding a single speed instead of my road bike around town. I am loving it so far, but one quick question - the wheels have nuts rather than quick release levers. I am guessing this is a security thing.

Does this mean that I always have to carry a wrench with me in case I get a flat? If I get a flat, I cant change the tire without removing the wheel and I cannot do this without undoing the nuts with a wrench. Am I missing something here?

Thanks in advance for your help with this very basic question.

15mm nuts are standard because quick release wheels aren't allowed on the velodrome. Since the equipment is carried over from there, we have to go without.

So yeah, just pick up a cheap 15mm box wrench somewhere and put it in your kit with you.

No way man, the 15mm nut is the newest advancement in security technology, it is virtually impossible to get the wheel off of a bicycle without the proper device

my mtb came with bolt on hubs, even if it didn't i would take my other wheelset that is bolt on a replace the ones the bike came with, at this point i will only ride bolt on hubs and at somepoint i will get a 20mm bolt on front hub and fork

You gotta carry a wrench if your going very far, but the odds of your wheels getting stolen drops. Pretty worthwhile for a city bike imo.

or you can buy qr skewers for $15 at performance.

I also find that nuts and washers secure the wheel much better than most skewers.

you could carry a puncture repair kit and remair the tube without removing the wheel.

I usually just carry the park tool 13/15 cone wrench. Small, cheap.

And yes I know it's not supposed to be used for anything but cones.

Then you don't know how to use skewers properly.

Unless the OP has one of the few track hubs with a hollow axle, new skewers would be useless.