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I can't get the bike seat stem to come loose - Bike Extreme Lite Youth Shoulder Pad

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I'm going to assume you that when you say, "bike seat stem" you mean "seat post". I'm also going to assume that the bike frame is made of steel and the seat post is most likely chromed steel.

What most likely is the problem (absent of more details) is that the seat post has rusted to the inside of the frame. If the bike is stored outside this is a very common problem on less expensive bikes.

I have never heard of a bike manufacturer putting any kind of paint or other anti-corrosion inside of the bike frame to prevent rust.

You can try spraying a little "Liquid Wrench" or WD40 oil on the seat post where it inserts into the frame. Let it sit over night and then tap it with a mallet to try to break the rust free. Use a pair of Channel Lock pliers to get a bite on it and see if you can twist it out.

On a steel bike the very last resort to use, if you by all means have to have that seat post out, is to apply heat to it, with a propane or oxy-acetylene torch. This will probably destroy the paint job and weaken the seat post.

If the bike frame is aluminum, you can get something similar to galvanic corrosion and this can seize the seat post in the frame. The remedy is the same as with the steel frame (but excessive heat and easily melt aluminum very quickly and leave a puddle of molten metal on the garage floor). If the frame is carbon fiber and the seat post is aluminum, carbon and aluminum don't like to touch each other and they will start a natural chemical reaction of corrosion which could cause the two to stick together (don't ever use a flame on a carbon fiber bike, it would be the end of the bike and just plain stupid). Anytime aluminum touches carbon or titanium an anti-seize compound should be applied to the parts.

Once you have the seat post removed, use your finger to wipe grease inside the seat tube and on the seat post before reinserting it and you won't have this problem again.

Posted on Apr 15, 2014


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I need to raise the height of my handle bars.

I am not sure which question to answer, so I will try both.

raising the handlebars, loosen the stem bolt 4or 5 turns, (this is the bolt on on the top of the handlebar stem). Tap the stem bolt with a hammer, the bold should drop down and the handle bars should fall loose, adjust as needed, then tighten the stem bolt to set.
Please note, there is usually a limit line on the stem, do not raise bars above this level as iy will make the handle bars unsafe and could pull out or break off.

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