Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to convert bicycle tires into studded snow tires [title] Purchase the right supplies. [title] Drill (using a very small bit) down from the center of chosen knob into the tire. [title] Drill a screw up from inside-out.

Ending1: [title] Put/buy a roller pan inside the part you are working on. [title] Take the bicycle tire tool (point 120) and make sure to place it straight into the bolt hole. Ending2: [title] Pipe out a long fuse into the tire. [title] Now press back on the center of the coupling housing. Ending3: [title] Insert bungee cord into the bottom of the tire. [title] Tighten the bungee cord using a plug hole drilled through the tailbar. Ending4: [step] If the angle isn't perpendicular to the tire, it'll stick out one side or the other. [substeps] Do one hole and screw at a time.

Answer format: ending1/ending2/ending3/ending4