Question about Mongoose Cycling
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Posted on Jan 02, 2017
You need an Allen wrench (a.k.a. hex key) to fit the bolt head right in the middle of the handle bars. Loosen this bolt just 2 or 3 turns then tap the head with a soft hammer or block of wood and a hammer. Then pull the handle bar stem up (and all of the way out so you can see how the wedge-shaped nut at the bottom of the stem works). Look for a mark on the stem telling you how high you can safely raise the bars (you have to leave enough of the stem inside the tube so that it will be strong.) Put it back in and tighten it up. If you found this helpful, please vote. Good luck
Posted on Jun 24, 2010
Depending on how high they need to be raised you may need to consider an adjustable stem or a stem extender. I would recommend taking your bike to a good shop as they will be able to take a look at how your bike fits you and what your options are .Its not just as simple as loosening the hex bolt in the stem and raising it as most stock stems don't give you much extra safe length to work with.
Posted on May 13, 2009
Local bike shop determined that both wheels were defective. I took the junk back to Walmart and got a refund... PROBLEM SOLVED!!
Posted on Dec 30, 2009
You can only raise a quill stem os far safely. Loosen the vertical center bolt that's in line with the steerer tube a few turns and then tap down on it with a block of wood or rubber mallet to unseat it. The stem should be loose enough to turn independently of the front wheel. You can also raise it somewhat, but look carefully for the "maximum height" or equivalent markings etched into the stem body. Don't expose any more stem than up to that line. Line up your handlebars with the front wheel and securely tighten that bolt. It should be tight enough to vigorously resist independent rotation when you hold the front wheel bewteen your knees and attempt to turn the handlebars.
If it's a new-style threadless type stem, the maximum height was determined when they assembled the bike because they had to cut the steerer tube to be below the top edge of the stem. Go to a Bike Shop and have them replace the stem with one that has a higher rise or shorter reach.
Posted on Aug 22, 2010
SOURCE: We would like to raise
Maximum height was determined when the bike was built and they sawed off the steerer tube.
There is no way to raise the stem vertically, short of getting a new stem that has a higher rise.
Posted on Feb 21, 2011
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Getting Riser Bars or simply flipping the stem over or getting one with a different rise and reach might give you the added height you need. If you LIKE the handlebars, the stem is the best option as most new ones come with front loaders (detachable front caps) that allow replacement without stripping components off one side of the handlebar. In minutes a Bicycle Shop could swap any number of them onto your bike for you to try.
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