If you hate to throw stuff away, then you will loves this Instructable. As a pack rat, you must have a number of worn out bike tires with no way to use them and no way to get rid of them. The answer is to use them as fenders on your road or other narrow tired bike. Besides the tire all you will need are some zip-ties (or wire or string), some steel rod or tubing, and some ingenuity. The result will keep your face and blaster dry while splashing through puddles on your bike. Read on!
Step 1: Materials
You don't need many materials for this project. The basic materials are an old bike tire, preferrably a wider mountain bike tire with wire bead, some steel rod or tubing (copper or other metal OK as well), and a refusal to throw anything away and pay $15 for a set of Chinese made fenders.
Bicycle that you want to put fenders on
One worn out wire bead bike tire wider than those on your bike
Some steel (or other metal) rod or tubing
A welder or torch to solder with
Some zip ties
Some scrap steel or copper sheet (20 Ga or so)
A power drill
A metal file
Some spray paint
A method to cut your tire
Misc bolts and nuts to mount your fenders.
To start with, take your scrap tire and cut it into sections that cover the desired portions of your bike wheels. See below for an idea of how much coverage is needed to keep you dry.