Bmx tire hole. Won't pump up! So I found a small thorn in my tire. It did make a hole in my tube so I replaced it after trying many solutions. My question: I'm wondering if because there is a hole in the tire but not the tube, why won't my tire fill with air?
Take the tube out and find out why its leaking. A picture or description of the tube damage may help diagnosis. 

A variety of things could have caused this:


Something else stuck in the tire which damaged the tube
Pinching the tube between the rim and the tire
Damage at the valve
A bad tube
A spoke coming through and punching the tube
Damaged Rim Tape
Etc.


If there is an appreciable hole or damage in the tire, it won't protect the tube and you need a new tire.

Recommended reading: Sheldon Brown