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Raising handlebar height safely on a Specialized Diverge

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Raising handlebar height safely on a Specialized Diverge

Old 05-13-21, 08:41 AM
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Raising handlebar height safely on a Specialized Diverge

Hi All:

I have a 2021 Specialized Diverge Elite E5 bike (this is a basic model without future shock spring suspension in the stem). I'd like to safely raise the stem a height 1 to 1.5 inches to achieve what should be the perfect fit for long rides (replacing the bike is not an option). Can this be accomplished simply by purchasing this length of spacers and inserting them under the stem?

That seems pretty simple (it's no problem for me to take the stem out and reinsert it at the correct torque) but my concern is that there is some unknown risk that I am not aware of, e.g., the stem may not be long enough to still connect well to the steerer among other things, as I am a novice at bike-specific work. Any advice on the most straightforward and cost-effective way to safely raise the stem 1 to 1.5 inches would be appreciated.

(This is a repost of one of my prior posts; following advice received there, I am now posting this to a more appropriate sub-forum.)

Thanks in advance,
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Old 05-13-21, 09:11 AM
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Do you have an inch or an inch and a half of steerer above the stem now?
​​​​​​Because that is where the extra height will come from. The stem has to move up the steerer and be supported by it.
If you do spacers are the way to go.

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Old 05-13-21, 09:14 AM
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We need some photos of your current setup to determine what can be done. You can add spacers under the stem if the fork steerer is long enough but dangerous if not.
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Old 05-13-21, 09:19 AM
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As above, unless you have spacers above the stem then there is no room left to move the stem up.

The solution will be to find a stem with more rise and probably a bit more length and swap out the original. You will likely have to replace cables and housing with longer ones.
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Old 05-13-21, 09:21 AM
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You have a thread less headset with a carbon steerer tube on the fork. So it's not quite like the old days with quill stems that you just went out and got a longer one on the quill end.

They make adapters that fit onto the steerer tube. I'm not a fan.

Handle bars with a rise and a stem with more angle may get you that one to one and a half inches more.

Specialized has stems

pick one. On the details page you'll see that most come in many lengths and angles. The ones with the most angle will get you the highest.

If that isn't high enough, then Specialized has riser handle bars

They go from about 15 mm of rise to 25 mm of rise. 25 mm is about that 1 inch you ask for, but it'll cost you a penny to do it with Specialized.

However there are other good brands of stems and riser bars out there. You just have to google, yahoo, bing or what ever it is you do to navigate the webs.
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Old 05-13-21, 11:07 AM
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If your current stem is angled down, you can angle it upwards to get some additional bar height. Or as suggested get a stem with a larger rise.
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Old 05-13-21, 11:23 AM
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Originally Posted by DC_Cycle View Post
...I am a novice at bike-specific work.
Bravo Stud...

That's the ticket. Soon you will be into it. Starts with the pump, then adjusting breaks, then checking your spokes, then truing your wheels, then... Fun, Fun, Fun...

However you decide to approach your change I am so glad to see that you are doing it to your bike.

Personally I have adjusted the stem height on some of my bars as little as 10mm and had almost dramatic changes in my ride.

So go for it... Bravo
No matter where your at... There you are... Δf:=f(1/2)-f(-1/2)
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Old 05-13-21, 02:40 PM
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The RedShift Kitchen Sink bar provides 20mm of rise and Surly's Truck Stop bar has 30mm of rise.

Super easy to add a suspension stem AND raise your bar height at the same time:

ShockStop Suspension Stem – Redshift Sports

Redshift ShockStop stem +30 degrees
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Old 05-13-21, 03:13 PM
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I think that in terms of ride safety it is more dangerous than it seems to be.

For comfort reasons, I increased spacers height from original 1 cm to 3 cm on a carbon bike. After almost 2 years of riding (including hard braking on steep descents), I noticed that the stem edge “sculpted” around 0.1 mm in the fork steerer and the thin aluminum expander plug inside the fork was deformed – sign that the fork steerer used to abnormally curve forward. Furthermore, fork play appeared every 3-6 rides and needed to be adjusted. All above were the result of highly increase in fork steerer forces forward, due to raising the spacers from 1 to 3 cm.

So, take care with that change: 2 cm raise in spacers height leads to unexpectedly high increase of forces over the fork steerer.
Stretching exercises with your body might be a much safer way to solve (or adapt to) your issue.
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Old 05-13-21, 03:43 PM
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To be absolutely clear, since no one has been, you can only raise your stem if there are spacers above it. You remove the spacers, remove the stem, put the spacers back on, then put the stem on top of them. The stem and the spacers take up a given amount of space on the steerer and you can't add to that. For example: You have 4 x 1cm spacers and a stem. The only thing you can do is put all 4 spacers under the stem...you can NOT add any more spacers.
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Old 05-13-21, 04:15 PM
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With a carbon steerer tube, you also want to check the location of the internal expander plug. If you are moving the stem up, you want to be sure that the area where the stem will clamp onto is supported from the inside by the plug.
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Old 05-13-21, 05:10 PM
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The Surly Truck Stop bar was mentioned. https://surlybikes.com/parts/truck_stop_bar Other brands have similar bars with +/-30mm of rise. Aesthetically that's probably the least offensive way to raise your bars beyond the designed height.
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Old 05-13-21, 06:00 PM
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Originally Posted by dsbrantjr View Post
If your current stem is angled down, you can angle it upwards to get some additional bar height. Or as suggested get a stem with a larger rise.
+1. Most stems will have the angle and extension printed in small numbers on them somewhere. They are listed in relation to 90 degree perpendicular angle to the fork steerer. -17 degrees would be listed as 83 degrees downward and flipped over would of course be 100 degrees. Sooooo, you can use this chart to determine how much rise in millimeters your stem will give you if flipped over. Stem Comparison Tool | yojimg.net For "fork/steerer head tube angle" if you don't know what the exact angle for your bike is just use 73 degrees as it's close enough to not make a big difference. For "height" you can just measure the spacers below the stem.
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