I'm so disappointed in my new fixie. I've had it for maybe 100-150 miles and I have had 3 consecutive flats in 1 week. I have checked the rims and found nothing, I have checked the thread and nothing. Every flat I have had has been such a tiny hole in the inner tube that I sometimes couldn't even see it.

Do I just need to buy a new tire, or is the rim screwed up?

Where exactly is the hole in the tube? Is it on the inside or the outside (rim side or tire side)? Did you run your thumb around the inside of the tire to find anything stuck in the tire? Did you carefully inspect the outside to see if there's any small cuts?

(The last has got me a couple times- a very small cut allows the tube to push through the tire just enough so it wears on the ground. Get a flat, fix it, 20 miles later it wears through goes flat again. Really frustrating.)

Sounds like a tiny piece of glass or radial tire wire embedded in the tire.

The hole has been on the inside more than the outside. I have inspected the tube and the rim several times.

There is no way my tube is pushing through the tire, I just bought it 100-150 miles ago. The tread is hardly even worn.

Take a cotton ball and rub it around on the rim and the inside of the tire. It will snag on any sharp edge that will cause a flat. bk

if the flat is on the inside, then it might be time to take a good hard look at your rim strip. If it has shifted a little bit, then it might have exposed just enough of a spoke hole to cause a flat.

If that fails, try a scientific approach; first try the same tire on a new rim, then try a new tire on the same rim. When you isolate variables, it all becomes clear.