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How to Patch a Flat Tire on a Bicycle

Step 2Plastic "Tire Irons"

Plastic \"Tire Irons\"
The bicycle patch kit came with these three little levers. They're called "tire irons" for historical reasons. She uses one to pry the tire over the side of the rim and then hangs the little hook on a spoke to keep it in place. She slides the next iron under the tire and pries it out further. She repeats with the third iron.
Now there's enough tire over the rim that it's easy to pull the rest over by hand.

Spoon handles work if they're smooth and you don't have official tire irons handy.
If you use screwdrivers it's very easy to puncture the innertube.

Remove the innertube from the tire.
You don't have to pull the tire all the way off the rim to do this.
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Author:TimAnderson
Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...
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