I am new at bikes. I got an old bike with flat tires which I decided to put back to life.
I went to Walmart and got the cheapest inner tubes (Goodyear) which turned out to be Schrader type. I had no idea about Schrader nor Presta valves, I was just getting new tubes.
When I started replacing the tubes, I saw that the valves of the old tubes were very different and my new valves didn't even fit the rim holes. I thought my bike was just too old and used some very old tube technology that nobody uses anymore.
I got rid of rim grommets and threw them away, and the new valves fit just fine. Now, however, the inner tube get cut around the valve all the time. What can be done to avoid cuts in this situation?