Question about Giant Boulder Se Mountain Bike 19" Aluminum Frame

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Hi! We just bought a Giant Boulder mountain bike on Craigslist, so it didn't come with any instructions. We were able to raise the seat to a comfortable riding position, but how do we raise the handlebars? Thanks!

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There are two styles of stems on modern bikes. Quill and threadless.

This site explains both:

Posted on Aug 22, 2010


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1 Answer

Raise handlebars on mountain bicycle

This will depend on what sort of stem you have. Most mountain bikes these days use a clamping style stem that simply grips the steerer tube on the fork. Some will have limited adjustment in that they may have a stack of 2 or 3 spacers that you can place either over the stem or below the stem. This does not give much adjustment. On my wife's bike the stem is actually adjustable similair to this: MEC 110mm Adjustable Stem Mountain Equipment Co op
and might be a good option for this bike.

Sep 18, 2014 | Huffy Granite 26 Women's Mountain Bike

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Seat post shim

Hi, 27.2mm is a standard size for a seatpost, popular sizes includes 30.9mm om newer mountain bikes and 31.6mm on older since it stadardized to some extent. There are still many other odd sizes out there on mostly older bikes.

If you can, get a seatpost that is 27.2mm that fits directly into your frame, with no shim if possible. that will only add weight and creaks.

Also keep in mind that the length is important when you specify a seatpost. You can use websites like this to see what is possible/available before you order:
Seatposts Chain Reaction Cycles

You will also have to consider if you need some setback, if the seat clamp is directly on the post, it is called a zero setback post like this:

Mar 04, 2014 | Giant Boulder Se Mountain Bike 19"...

1 Answer

When shifting front derailer,it doesn't quite reach the next sprocket.

Hi there,

Two things you will need to check.

There are two stop screws, one to limit inside movement, and one to limit outside movement, this will need to be tuned. 20932402-rsx4m12fp5prszbjjw0ik22q-1-0.jpg

Some may even have a H (high big blade) and L (low - small blade) indications. Screwing them out, enables MORE freedom in that direction.


The last thing to check, is the cable that pull the deraileur, if you cannot reach the limits you need, it might have slipped on the cable, then you need to release it - on small gear, pull it out as far as you can, and tighten it again, and hold thumbs that it works!

Good luck!

Oct 23, 2013 | Giant Boulder Se Mountain Bike 19"...

1 Answer

Boulder 3 Mountain Bike..location of serial number

Serial Numbers are usually in one of two locations.
  1. Turn the bike upside down and look at what is the very bottom of the frame where the pedals and cranks pass through. This is the bottom bracket shell. Serial numbers are commonly stamped here and will be a long series of numbers and letters
  2. Occasionally they are also stamped inside the rear dropout on the left or right. The rear dropout is the part of the frame where the rear wheel is connected.

Matt @

Oct 17, 2012 | Giant Bicycle Inc. Cycling

1 Answer

I have a giant boulder mountain bike and i want to raise the bars. do they make a special componant for this . ray

A major limitation is the steerer tube length. No matter how many times you cut a steerer tube it won't get longer.

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 and least-invasive 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.

A reputable Bicycle Shop would have fit the bike to you before you took it home.
You can search the web for many answers, too.

Sep 19, 2011 | Giant Boulder Se Mountain Bike 19"...

1 Answer

My pedal has somehow broken inside and now it spins freely without moving the chain

Being a mechanical problem that we can't see you will need to define it better to us or yourself.

I'm sure if you looked at it closer you would see that the pedal itself is supposed to spin freely while it turns on the crank which turns the chainring which transfers motion through the chain to the gear(s) on the right side of the rear wheel which drive the wheel forward.

Now, where do you think the breakdown really is?

Any search engine would then offer definitions and solutions to a well-crafted query like "bicycle chain slipping" or "bicycle gear slipping".

Aug 15, 2011 | Giant Boulder Se Mountain Bike 19"...

1 Answer

(giant brass sx) its not so much as a problem as it is a question iwas wondering if i could convert it to a single speed

Any bike can be converted to single speed.

Any search engine answers how "convert to single speed mountain bike"

Aug 13, 2011 | Giant 09 Brass Sx Dirt Jump Freeride...

1 Answer

Cannot send comments to your guy to get specific info I requested

The manual that comes with the bike is a general one, I sell 5000+ bikes a year and can tell you that what you are asking for is not available. Giant, Trek, Cannondale, and the highter price bikes are only sold through bike shops, assembled professionally. You cannot buy them in a box, so your bike is already adjusted for you. You can go to any bike shop and they will verify what I am telling you. Now, what is the problem that you need the manual to answer?

Jul 26, 2010 | Cycling

2 Answers

How do you hire the handle bars on a giant mountain bike

Hello. You will need an adjustable wrench. Then look at the center of the handlebars and you will see a bolt and a nut. Usually the nut is on the underside. Loosen the nut, raise the handle bars and retighten the nut. J.

Jun 01, 2010 | Giant Boulder Se Mountain Bike 19"...

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