Some of the tools pictured above will be required to replace a tire. Since most tire replacements are a home maintenance project, in addition to the above tools, it is handy to have a robust tire pump handy as well.
Tire replacement happens because of a damaged tire, a worn out tire or the replacement of a tire for increased riding performance. Rarely would the tube be replaced or need to be replaced when doing a tire replacement. Tubes are repairable and do that before replacing a tube.
After you have removed the wheel from your bike, the first thing you need to do is let out all of the air from the tube. If you have a Shrader valve it helps a lot to remove the inner valve first to ensure as little air is left in the tube as possible.
Once enough air has been removed from the tube, insert your first tire removal lever as shown in the above photo on the left and hook it on a spoke as shown. The next tire lever should be inserted about 4 to 6 inches away from the first and again the tire should be levered over the rim. Repeat until one entire side of the tire is free of the rim. Note that it does not matter where on the tire rim you start this tire removal lever process nor does it matter which
side. The only object
is to remove the tire from one side only, completely, so that the tube can be removed.
Can't find the arrow? In recreational riding, I just don't think this directional rotation arrow proves a whole lot. That being said, if you ride with knowledgeable bicyclists and they know you replaced the tire, they will probably look to see if the arrow is going the right direction. If they find it isn't, they will tell you to take the tire off and rotate it 180 degrees to put the arrow facing the correct direction. If you ask them why, they won't be able to tell you. Just pretend to hear their sage advice and promise to make it right the next time you get a chance.
You will also notice that this specific tire says "front use only." Yes, higher quality tires do differentiate between the front and back with their tires, optimizing the tread and tire casing for the task at hand. For instance, the front tire receives almost all of the braking abuse while the rear tire takes a lot of sideways abuse. Tire abuse can be compensated for with optimised tire construction. I believe as long as you don't enter a race at Moab, Utah, you will be fine with any installation of any tire. If you are an aspiring racer or serious mountain biker, then pay attention and put the directional arrow going the correct direction and a "front" tire on the front and a "rear tire" on the rear. Also, replace the front and rear tires with the same brand and model tire because those front and rear markings and directional arrows benefit you the most when the front and rear tires are matched.
Now that I have given you all of the whys, lets mount your new tire. With the directional arrow positioned correctly, ease any edge of the tire over the rim leaving the other edge free to place the tube into.
Install the tube valve first and if it is a Presta valve apply the nut to the stem as well. If it is a tube with a Schrader valve, make sure you reinstall the valve with the valve tool in the opposite direction you took it out. Make the Sharder valve finger tight, being careful not to over tighten it.
With the tube valve installed in the rim, now work the tube completely into the tire making sure there are no folds in the tube. It helps to have the tiniest bit of pressure in the tube while doing this. A tube that is completely flat will not conform to the tire properly when you lever the tire back over the rim.
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