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How does an out front mount affect aerodynamics?

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How does an out front mount affect aerodynamics?

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Old 11-23-16 | 04:21 PM
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Finally we're asking the important questions.
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Old 11-23-16 | 04:22 PM
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Originally Posted by Sy Reene
One reason I opted for fizik stem was for compatiblity with the direct connect Barfly option; I'm trying to convince myself this actually subtracts about 10 watts versus no mount/computer at all.

Slamming the stem will make your body more AERO than any mount.
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Old 11-23-16 | 04:29 PM
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Originally Posted by oldnslow2
Slamming the stem will make your body more AERO than any mount.
If you have the flexibility. Otherwise it will only make you stretch your arms more.
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Old 11-23-16 | 04:39 PM
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Free Aero.. HTFU

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Old 11-23-16 | 04:44 PM
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Originally Posted by RPK79
Finally we're asking the important questions.
I don't think anything could be more important (than entertaining me with random bike science until I can head out).
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Old 11-23-16 | 04:44 PM
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Originally Posted by oldnslow2
Now imagine how fast you'd be if you could do that with your computer mounted in the reddest way possible.
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Old 11-23-16 | 04:46 PM
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Originally Posted by Seattle Forrest
Now imagine how fast you'd be if you could do that with your computer mounted in the reddest way possible.
Why not remove it all together. Less aero drag and less weight. It's a Win Win.
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Old 11-23-16 | 05:48 PM
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Originally Posted by Sy Reene
nah.. it's perfectly angled to send air right over the top of the stem bolts and straight down the top of the stem, while underneath the angle of the garmin is slicing thru the the air and sending the jetstream below the stem.
A stealth mini-faring to capture those mini-watts! Awesome!

I just didn't want you to think you were saving a watt but really losing one, and all the other out-front Garmin riders laughing at you behind your back. But they're thinking 1° or 2° and your 7 or 8 is a totally different picture, joke's on them now.
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Old 11-23-16 | 05:55 PM
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Originally Posted by oldnslow2
Why not remove it all together. Less aero drag and less weight. It's a Win Win.
All joking aside, whatever difference there is isn't enough to feel, so it's not really important. But I love bikes and I'm a curious kind of person in general. I'd like to know the answer just because.

But having a computer is too valuable to give up regardless of what the answer is. Especially with maps, I like riding in different places.
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Old 11-23-16 | 06:36 PM
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Originally Posted by wphamilton
A stealth mini-faring to capture those mini-watts! Awesome!

I just didn't want you to think you were saving a watt but really losing one, and all the other out-front Garmin riders laughing at you behind your back. But they're thinking 1° or 2° and your 7 or 8 is a totally different picture, joke's on them now.
Exactly! Wind comes from the sky, not the ground.
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Old 11-23-16 | 07:06 PM
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Originally Posted by Sy Reene
nah.. it's perfectly angled to send air right over the top of the stem bolts and straight down the top of the stem, while underneath the angle of the garmin is slicing thru the the air and sending the jetstream below the stem.
Tilted up creates lift and effectively lightens the bike.

Lighter = faster.
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Old 11-23-16 | 07:11 PM
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Surely the most important thing is to make the text on your Garmin incredibly small. That way, every time you read your power output, you have to bend over till your face is 3 inches from the device which will make you more aero.
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Old 11-23-16 | 07:44 PM
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An awful thought: if the Garmin that's tilted up at between 1 and 2 degrees is a parachute, what about the saddle?? Is my 1° saddle tilt also turning it into a parachute? Do we have to level everything on the bike now?
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Old 11-23-16 | 10:08 PM
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It think it is better for two reasons.
-If you want to look at it there is less head movement and that cost AERO.
-If it is close to the stem it helps shield the stem, vs on top which is mostly catching air and your body is too far back to draft that.
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Old 11-23-16 | 10:28 PM
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I like the out front mount (but not enough to spring for more than the Sram one)

because it's easier to see, and the angle can be adjusted to get rid of the sun glare when it happens.

Can't measure the parachute effect, because one position had too much glare to read the wattage.

I also don't feel so confident in the rubber bands used in the standard mount.

Bottom line, 'tho- is setting it up the way the cool guys do....
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Old 11-24-16 | 08:03 AM
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Originally Posted by wphamilton
I believe there is more drag going on around the handlebars than we usually credit it, and I suspect that the stem mount, in spite of the optics adds little if any additional drag due to the turbulence. With a particularly aero handlebar and flipped stem it may be a different story.

I've actually been mulling over a side-mount on the stem, to get it behind the bars, but haven't yet because of this uncertainty. This is a trivial enough concern to warrant some testing IMO.
That's what I do.
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Old 11-24-16 | 08:18 AM
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Originally Posted by shafter
That's what I do.


You just twist it down when you drop the hammer. The simple effective solutions like this are easy to overlook.
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Old 11-24-16 | 08:26 AM
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If you are truly serious about performance, before a hard effort you should pull the computer and mount off and discard it on the side of the road like pros do with water bottles.
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Old 11-24-16 | 09:38 AM
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Originally Posted by Wilfred Laurier
If you are truly serious about performance, before a hard effort you should pull the computer and mount off and discard it on the side of the road like pros do with water bottles.
But then you have no data record of your manlyness!
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Old 11-24-16 | 09:52 AM
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Originally Posted by shafter
But then you have no data record of your manlyness!
Or lack there of.
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