Glen & Kris Denning → Segway → Segway Tire Dismount < Previous Next >
The valve core tool is used to remove the valve core from the tire valve (turn counter-clockwise to remove). This will allow air to pass freely in and out of the tire as you work to free the tire bead from the rim (commonly referred to as "breaking the bead").
Although you might be tempted to skip this tool, do not! Removing the valve core makes breaking the bead much easier. These tools are available inexpensively at bicycle shops, and there really isn't a good substitute in most toolboxes.
Now let's look at some tire levers.