7.8g DIY Wahoo stem mount for Kalloy Uno 7

Discuss light weight issues concerning road bikes & parts.
Marin
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Location: Vienna Austria

by Marin

Ended up using 2.0mm spokes, DT Revo were a bit too flexy at 1.5mm. The stiffness upgrade cost me 0.9g!

Wahoo mount 2$ from aliexpress. Really happy with the result, works fine even on gravel. I made the forward loops a little too big so I could correct the mount angle because making the lengths 100% identical is really hard.

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by Weenie


Marin
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Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Haha, I just realized that this is roughly half the weight of the lighest mount in this test: https://granfondo-cycling.com/pimp-your ... ps-mounts/

Proves once and for all that steel is real :thumbup:

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Klaster_1
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Location: Russia

by Klaster_1

This is really cool, I should try to do something similar for my Strada Slim. Is stiffness enough to press buttons on the head unit, if there are any?

Marin
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Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Yes, no problem especially since the Wahoo buttons are near the stem. I always pinch the computer between my fingers though, especially on the regular mount - to prevent it from rotating.

mdeth1313
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by mdeth1313

What do you use to make the loops?
Speedplay is the devil!

BmanX
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by BmanX

This is awesome.
BIG DADDY B FLOW
AERO & LIGHT is RIGHT

Cervelo SLC 5960g/13.13 lbs

dtwolfen
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Joined: Wed Feb 15, 2017 9:05 pm

by dtwolfen

Great ingenuity and resource management. Love it when someone can think of something new using available resources. Next up a face plate with wires already coming out so weight weenie can use a shorter bolt.

Sent from my LG-H700 using Tapatalk


alcatraz
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Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Cool idea.

From looking at the pics you might need to "loop" a bit more under the garmin or you might end up twisting the entire plastic seat out from the spokes when mounting/removing the garmin. Don't you think?

Marin
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Location: Vienna Austria

by Marin

alcatraz wrote:
Tue Aug 13, 2019 2:40 pm
Cool idea.

From looking at the pics you might need to "loop" a bit more under the garmin or you might end up twisting the entire plastic seat out from the spokes when mounting/removing the garmin. Don't you think?
No, the loops are amost closed but oval so I can adjust the angle. The mount doesn't budge when the bolts are tight.

Marin
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Location: Vienna Austria

by Marin

dtwolfen wrote:
Tue Aug 13, 2019 2:01 pm
Great ingenuity and resource management. Love it when someone can think of something new using available resources. Next up a face plate with wires already coming out so weight weenie can use a shorter bolt.

Sent from my LG-H700 using Tapatalk
Thanks!

I'm using black Ti bolts that are only 1mm longer than stock :)

But with the Kalloy stem being so cheap, you could actually just drill 2mm holes in an extra set of faceplates and glue in the spokes. Hmm...

Marin
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Location: Vienna Austria

by Marin

mdeth1313 wrote:
Tue Aug 13, 2019 1:40 pm
What do you use to make the loops?
For the stem side loops, I put a 4mm bolt in my lathe chuck and wrapped a 2mm spoke around it. Should work the same by putting the bolt in a vise.

The computer side loops aren't that critical and need some wiggle room anyway, so I just did them with needle noose pliers.

burglarboycie
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Location: Northamptonshire UK

by burglarboycie

Not only super lightweight but I also think this look really cool. Very minimalist, I’ve never liked ‘chunky’ looking computer mounts no matter what their weight so this is perfect to me!

Miles253
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Joined: Wed Apr 23, 2014 9:32 am

by Miles253

That's a very cool solution
Specialized S-Works Venge | in progress
Rose Backroad | 9kg
Canyon Ultimate CF SL | 7.5kg

https://www.findyourroad.co.uk/
Instagram: @miles_bc

alcatraz
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Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

How much do you trust the lower two bolts to hold that handlebar tight?

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Klaster_1
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Location: Russia

by Klaster_1

If your stem has front-facing hollow bolts (like Hyperstem) and spokes fit through, the mount can be fixed in a different way.

by Weenie


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