Ultra-thin AirTag bike bottle cage mount

A concealed mount for hiding an AirTag on a bike — thinner than an AirTag.
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updated February 24, 2024

Description

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An AirTag mount that sits hidden under the bottle cage on a bike. The mount (including the AirTag) is thinner than an actual AirTag! See “AirTag Preparation” below for more info.

The mount is made of two halves. The top half gets screwed (with a thread on the model) onto the bottom half, locking the AirTag into place. This theoretically keeps the AirTag from water damage (no guarantees though) (:

Text can be added to the mount. To edit the text, use the Onshape document and edit the last feature ("Surface Text 1").

 

Print Instructions

 

Both halves are only one layer thick at their thinnest point, so make sure your first layer is tight (use this if you need inspiration).

The mount in the pictures was printed with a 0.4mm nozzle, 0.15mm layer height (first layer: 0.2mm) in Prusament PC Blend Carbon Fiber Black.

 

AirTag Preparation

 

Since the final mount is actually thinner than the AirTag, some magic needs to happen first to shed some of that AirTag thickness.

 

1. Remove AirTag battery cover

Start by removing the battery cover (press & twist) which will save a couple millimeters. The mount will act as a battery cover. You can dispose of the original cover.

2. Sand down until speaker

 

Don't worry, AirTags don't have feelings (I think). By sanding down the top part of the AirTag (until the speaker shows) saves a couple millimeters. The AirTag will still be functional (including sound, for mysterious reasons) though that will definitely void your warranty.

3. Clean up & Grease thread

 

 

Apply some grease/lube on the thread. The tolerances are tight and this will make it easier to screw both halves together. In theory it should also make everything watertight but don't quote me on this. 

(Note: if for some reason you need to adjust the tolerances, open the Onshape document and edit the Thread/Thread [Boolean]/Offset distance)

4. Insert AirTag

 

Insert the AirTag as shown in the pictures (notice how the inside of the two halves are slightly different, since the match different parts of the AirTag).

5. Screw top cover

 

Align the thread on both covers, apply some pressure and start screwing. Once both covers align perfectly (with no gap between the covers) you can mount your AirTag on your bike!

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The author marked this model as their own original creation.

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