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What size allen wrench to i need to tighten the handlebars on my daughter's diamondback tess bike?

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  • bethdowd May 28, 2011

    what size allen wrench do i need to tighten diamondback tess bike



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Everything is metric if that helps. 5mm??

Posted on May 28, 2011



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Diamondback tess 24 has clicking in gears and is hard to shift

sounds like the derailleur cable is stretched out and needs to be adjust. search here or google on how to adjust a derailleur, or take to your local bike shop, it's a cheap repair.

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Handlebars allen

If you are asking what size Allen wrench you need to loosen/tighten the handlebars, you are most likely looking at a 5mm. In rare instances, it could be a 6mm or 4mm. As a cyclist, those three sizes are good to have as they correspond to 90% of the bolts on your bicycle.

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The handlebars on my daughters Jubilee seem to have fallen downward. She thinks a bolt securing it has fallen out, but it looks to me that if we tightened the middle with an allen wrench it would secure...

There are two sets of bolts here. The first one is straight up and down, is probably the one that takes and Allen wrench and is the one that tightens the handlebar stem - that's the pipe that goes down into the frae toward the front wheel. At the bottom of that bolt (inside the bike frame where you cannot see it) is a wedge-shaped nut that wedges the stem tight. If the stem is loose, then you will be able to stand in front of the bike with the front wheel between your knees and turn the handlebars side to side, and if it is loose enough you will be able to pull the whole stem right out of the bike. On the other hand, maybe you mean that the handlebars twisted down (so that the ends of the handlebars are pointed toward the ground - this would mean that the other bolt or set of bolts are loose. Some bikes have one bolt that clamps the top of the stem around the handlebars, and some have 4 smaller screws that do this. If this is where the problem is, then no, you don't need to buy the Allen wrench, but it sounds like you might need a bolt.

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1 Answer

Just bought a diamondback edgewood lx hybrid. want to raise the handlebars but the top bolt won't loosen, even with the correct size allen wrench. I just can't get it to budge.

spray it with WD-40 or any other spray lubricant, leave it for a bit, wipe off the excess lubricant and tap it w/a mallet. you can use a hammer if you dont have a mallet but not to hard:) then try it again:)

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The gear shifter on the Girls' Diamondback Tess 24 is too tight for my daughter to shift gears. She can shift down toward the higher numbers, but getting back up to 3-2-1 is nearly impossible for her....


these can be adjusted, but the first thing to do is to change the entire gear cable.
spraying the whole thing with wd40 or simillar may help, but the lining of the outer cable has almost certainly worn and is causing the problem you are having.

this is very common. bike makers tend to use relatively cheap cables, and they can wear and cause problems quite easily.
oil the new cable before you fit it and you should not have any more problems.

hope this helps

Jul 07, 2011 | Diamondback Tess 24 Mountain Bike Girls' ...

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Can the handlebars be raised? If so, how?

The handlebars are in a fixed position, they cannot be raised.

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The front tire and the handle bar are not turning together. When I turn left or right the handlebar is all that moves. The front tire is just kind of "there". How do i get the two connected so...

Depending on how old your bike is there is an allen head or a nut at the top of your handlebar that when adjusted properly tightens the stem of the handle bar. You just have to tighten it down. Most use metric allen wrenches or sockets.

Mar 05, 2011 | Cycling

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What size allen wrench do I need to tighten the handlebars on my 2010 Diamondback Joker?

It is generally either a 5mm or 6mm depending on which bolts you are looking at. Sometimes they are SAE instead of metric but that is rare.

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How do i raise the handle bar?

behind the handle bars, where it joins to the bike is called a stem. Remove the center allen key bolt that runs down the center tube. Lift the handle bars up an inch and tighten the allen key bolt again. Your handlebars will now be a little higher for you.

Another way is to loosen the clamp bolts that hold the handlebars to the stem. With riser bars, you can twist them in the same spot and this will angle them up a little. You will have to loosen the brake/gear levers and angle them down until they suit you.

If neither of these works you can buy stems which have varying heights and lengths.

Hope this helps, please vote for me.

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Diamondback rm 20 kids bike. Can you adjust the handlebars?

Yes, there is an allen screw on the top of the stem of the handle may also be a bolt with a head on it that can be turned with a socket or cresent wrench.

Loosen the bolt 3 or 4 complete revolutions and then wiggle the bars back and forth from side to side while pulling up. Be careful not to completely remove the screw as the piece that it is connected to will fall off and you will have to remove the bars completely to fix.

May 02, 2009 | Cycling

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