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Library: Mounting Tires

This document is released under the terms of the Creative Commons License unless otherwise noted.
Thanks to Skye P. Nott for writing this article.
Last modified 2006-04-02.


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No, this isn't about how to put the spare on; I hope you can figure that one out on your own! This is an article on the method I use to put new tires on a rim, or change the tube on wire wheels, if you're too cheap to pay some monkey to do it at the tire shop, or just like doing things yourself (like me).

If you don't want to shell out for a tire machine, you will need good, long tire irons (spoons). Mine are about 2ft long, they can be hard to find these days but I got mine from a trucking supply store. There are other labour-saving devices such as mechanical bead breakers also available, if you plan on doing this a lot. When I had wires, the tubes got punctured often (long story) and I got to be pretty good at fixing them. Be careful not to damage the bead on the tires or they will be junk. Having a small bucket of soapy water on hand helps a lot, but spit will do in a pinch. It's hard work, after doing 4 wheels you'll probably be sweating buckets.

I would NOT recommend using screwdrivers, you run a much greater risk of damaging the bead (or tube where fitted), and they do not give the leverage required.

You can also use a 10 inch carpenter's wooden parallel clamp to break the bead, which can be a lot less work, and takes less room than a dedicated tire machine. Once you get good with spoons though, they are probably the fastest way to get the job done.

Generic Tire Spoons

The "bead" is the circle of rubber where the tire contacts & makes an airtight seal against the rim. Rims have a little "platform" where the bead sits, sometimes with a slight hump so the bead is wedged between the hump and the lip. Obviously, two beads per tire.

The procedure I've used is as follows:

  1. Deflate the tire (remove valve from stem).
  2. Use a spoon to lever the tire towards the CENTER of the wheel, you may need to go around several times and jump on it to "break the bead". The idea here is that you need the opposite side of the bead to be able to tuck down into the lowest part of the rim, so as to give it enough slack to get the near part of the bead up and over the lip of the rim. Alternatively, you can place a bottle or floor jack on one side of the tire, and wedge the other side of the tire against something (a timber to a ceiling joist would work) to break the bead.
  3. Now, stand on one side of the tire so that it will tuck into the lowest part of the rim, and lever the opposite side up and over the lip. You will need two spoons, leave the first one that you get over in place, and use the second to get more of the tire over the rim. You'll have to start in small increments from the stationary spoon, but after you get half the tire over it will get easier. Proceed until the entire sidewall is on the outside of the rim lip.
  4. Flip the wheel over and break the other bead as in Step 2.
  5. Now there is only one bead inside the rim, and the tire will be loose. Put the "tire side" on the ground, and lift the rim so part of the bead is in the lowest part like in #3. Start one spoon in and move the second as in Step 3, and the rim will pop out.
  6. Stretch your cramped back and enjoy the beverage of your choice.
Assembly is, as they say, "reverse of disassembly".

Article written by Skye P. Nott.




Comments on this article:
Comment by Marty Ray on 2006-03-15 09:33:42

A set of bead breaker tire irons, which fit together to lever the bead down, is very helpful. One extra iron is helpful to keep the portion of the tire you have succeeded in levering over the rim, in place, as you move further around. Breaking the bead is difficult, especially on painted wheels, if rust has developed in the bead area of the rim. The instructions are somewhat misleading, however, because you really need to break the bead on both sides before you try to lever the tire casing off the rim. Put something on the ground to protect the wheel as you maneuver it, such as plywood or thick cardboard. When reinstalling the tube, it is helpful to have a tool to keep the valve stem from going back through the hole before you can inflate the tire. I use a valve stem thread restorer tool for this but there are other options. Having a tool to unscrew the valve core is useful too. Tubes can be repaired with self vulcanizing patches, which have a flammable substance you light on fire.

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