Tech Tips
Dismounting a tire from rim using tire irons
Topic: instructions for demounting a tire... (1 of 9), Read 68 times Conf: URAL Customer Service From: Thomas Creedon ( ) Date: Sunday, February 06, 2000 02:51 PM Could you give me some instructions on how to demount a tire from it's rim using the two tire irons in the took kit?
Believe it or not I've never needed to remove any tire from any rim! :-) Ah the joys of growing up in a post industrial age, where there is always a specialist down the road to do it for me! Heh.
Thanks,
Topic: instructions for demounting a tire... (2 of 9), Read 61 times Conf: URAL Customer Service From: Vance Blosser ( ) Date: Sunday, February 06, 2000 04:40 PM Tom;
It's a bit of work but it's not rocket science. I'm sure someone can improve on my methods but the skill isn't needed much these days...
I'm assuming the wheel is removed, ready to work on. Most of the metal valve caps have a small notch on the top for removing the valve from the valve stem, there is also a tool in the kit to do this. Press it into the valve stem and unscrew the valve. DO NOT LOSE this unless you have spares. This will let the tube go totally flat.
Lay the wheel down. You must 'break the bead' - pop the tire loose from the rim. Usually you can do this by pushing on the sidewall. You may have to step on it. Break it loose all the way around.
This is a drop center rim - the rim slopes down towards the middle. What you need to do is get one side of the tire rim into the dropped center so that the other end will have enough slack to pop over the rim. So 180 degrees opposite the valve stem hold/push the tire rim towards the center with your knees or use an assistant. Now take one of the pry bars and insert the spoon shaped end, spoon up, under the tire rim. BE VERY CAREFUL TO NOT PINCH THE INNER TUBE TWIXT BAR AND TIRE, NOR BETWEEN BAR AND RIM OR IT WILL PUT A HOLE IN IT. Push down with the iron, and the rim of the tire will pop above the wheel rim. Use the other iron and go a couple inches to the side of the one you just pried and do the same thing. After the rim pops up there, move the 1st one a couple inches farther round and repeat this process - you will 'walk' around the rim. It will come pretty quickly near the end.
Once you get 1 rim of the tire over, reach inside and pull the inner tube out. Then pull the other rim of the tire up against the wheel, dropping one side into the low place as in the first rim, and repeat the process. This side is usually easy as the innertube is gone and you can put more leverage on the tire and wheel.
When apart, check the rubber strip that covers the spoke nipples and make sure it's centered and in good shape. Some people use duct tape, others say that traps water, you decide.
When putting the tire back, basically reverse the process with the following note: 1. when replacing the innertube, I found it helps if I replace the valve stem very LIGHTLY inflate the innertube - enough to hold a sloppy shape. If it's too flat (esp. out of the box) it's more difficult to keep it positioned and easy to pinch. You may find differently. 2. Again be careful, it's still way easy to pinch the innertube, ruining your nice work.
When the put the innertube on, you will want to make sure you pay attention to the valve stem, as while you are busy with the rest of the tire this fellow will go back inside. Esp. after you seat the final bead. There are tools available that fasten to it to hold it in place; some of the non-Russian tubes have a threaded shaft with a hold-down nut that works great.
I find that a bit of soapy water helps as a lubricant, but some people don't like any lubricant.
Hope this helps, it will serve until the official process is posted.
The Original Hackers ride 3 wheels!
The intelligence of the world is constant - but the population is increasing!
Topic: instructions for demounting a tire... (6 of 9), Read 46 times Conf: URAL Customer Service From: Red Menace ( ) Date: Sunday, February 06, 2000 06:16 PM Good instructions ; Ural and Dnepr tires are *relatively* easy to change. Here are some tricks that have helped me.
1) Break the bead entirely on both sides of the rim. With the tire loose in the center of the rim it will be easy to remove the tube. If the rim is rusty or the bead is stubborn c clamps work to bust it loose. Another method is to use a jack on the sidewall of the tire and under the bike or a car to press the tire bead free of the wheel
2)If you value the inner tube take it out before pulling the tire off the rim. When installing the new tire, slip the tube in and be sure it is not kinked and the valve is straight and the nut snugged down. Just a puff of air will make the tube a little harder to pinch. Take small bites with the tire irons. Trying to lever too much tire over the rim at once is a sure way to pinch the tube.
3) Lubricants can be a big help! I prefer to stay away from WD40 for this chore as it probably isn't good for the rubber and certainly is not good for traction. Silicone can move down to the tread when the tire warms up, so I don't use it either. Warm soapy water works well. My favorite, cause it works and doesn't rust the rim, is waterless mechanics soap, like GOOP.
4) a warm tire is easier to change than a cold tire. If you have the choice, bring your tire inside the night before.
Vernon (the Red Menace)
Topic: instructions for demounting a tire... (7 of 9), Read 37 times Conf: URAL Customer Service From: Tom Jordan ( Date: Sunday, February 06, 2000 06:58 PM And another point...Some bikes already have a tire / wheel holder built on to the trunk lid.
I saw it in use at the NARMA rally, if I remember Russ and Warren were doing a tire change. They made it look easy.
Tom NARMA # 5
Topic: instructions for demounting a tire... (8 of 9), Read 23 times Conf: URAL Customer Service From: AUGUST WAHRER Date: Sunday, February 06, 2000 08:55 PM Here's a couple of more tips, get a plastic milk box to put the wheel on or a couple of 2x4's makes it a little easier than having it on the ground. Russian tubes (all the ones I have anyway) do not have any nuts on the stem just rubber and a valve cap. Go to an auto store and get a valve stem holder so you can pull the stem out of the rim and keep it out while you put the tire on.
If you round and smooth the Ural tire irons where they go into the tire you will stand a better chance of not pinching the tube.
I also use some talcum powder on the tube which makes it slide more evenly in the tire when you put air in it.
Gus at Hudson Valley Ural