This is a test of commonsense. Complete the next sentence:

How to convert bicycle tires into studded snow tires
Purchase the right supplies.
Drill (using a very small bit) down from the center of chosen knob into the tire.
Drill a screw up from inside-out.
If the angle isn't perpendicular to the tire, it'll stick out one side or the other. Do one hole and screw at a time.