How to Straighten a Bicycle Wheel

Ralston Heath
Ralston Heath
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As a bicycle repairman I often get asked by friends and neighbors to fix their bikes. One common problem is the straightening of wheels. The techniques you are about to learn are for fixing the wheels from what I call department store bikes, and are not necessarily the top quality bikes you get from
an independent bike shop. These tricks are for helping out your neighborhood kids and your local homeless person who, unlike serious cyclists, usually cannot afford new wheels. Most likely they could buy a new bike for the same or less cost than repairing the wheel at a bike shop, but to help out until they become better bikers, or have more money, you can fix their wheel for them.

The wheels get bent usually by people doing things they don't know any better to do, or doing things they shouldn't. Like hitting speed bumps at full speed, or riding over a street drain, crashing into a pole, or trying to jump a curb. Sometimes it is from trying to do tricks with their bike that it wasn't designed to do, like ramp jumping. The common term around here is "taco"; to have tacoed your wheel is to have bent it so that your bicycle can no longer be ridden.

First things first, the tools you will need. You will need a rubber hammer, a regular hammer, a block of wood, your regular tools of course, and your grill or trash can. You will learn about each as we progress through the lesson.

 
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For non-metal wheels, except fiberglass, the straighning technique is to use heat and pressure. I use the same grill and my tile heat gun. Locate the warped area and put it so it is down (bend towards the rim of the grill) and turn on the heat gun. Using your wood block (hot plastic can leave a nasty burn) aim the gun at the "spoke" that is nearest the warp. Keep moving the heat gun back and forth, holding it in one spot will melt through the plastic, as you see a color change press on the wheel with the block until you get it "straighter". There is no truing of those kind wheels, but you can get them straight enough so the kid can ride the bike again. For a fiberglass wheel, take it to the bike shop and pay them to do it. If you can afford carbon wheels you can afford to pay the shop to fix it.

Posted on 11/25/2008 at 3:11:43 PM

will it work with polymer and kevlar rims

Posted on 11/20/2008 at 9:11:01 PM

this is great instructions on how to ride a bicycle tire, I was afraid to attempt the task, but I was on the right track. Takes years of courage to try this. Thanks, Robert H. Nanaimo BC

Posted on 08/15/2007 at 9:08:00 PM

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