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Bicycle Stem Headset AirTag Mount

PedalingAstronomer

If you value your bike, you need this.

I travel far on an overloaded cargo bicycle, and for the first ~50,000 miles, its stem cap was an electronic analog clock, which is to say, I’m old enough to still be an analog guy. But that clock quit working about 15,000 miles ago, because I travel in all four seasons through all varieties of weather, and — who knew? — electronic analog bike-stem clocks don’t like getting wet.

I’d been meaning to replace it, but I’d gotten used to having a stem cap that wasn’t just a stem cap, you know. So I was searching for another sacrificial electronic analog stem clock — the old one lasted years, after all — when I noticed this option, and it too is more than a stem cap. But this one serves a function I need a lot more than an analog clock. After all, there’s a bike computer on the handlebars, and it shows the current time in digits, plus much more, and I’ve also got a watch on my wrist.

But an AirTag secured in a weather-proof housing to the stem of my bike? Yeah, that I need.

Installation was as easy as the old analog clock, which I had to remove annually to replace its button battery. The AirTag even uses the same ubiquitous 2032 battery, and I always have a few of those in my backpack. Apple says the battery can last up to the same full year in the AirTag, so all that will have changed for me is that I’ll no longer be staring at an analog clock that’s only right twice a day.

This AirTag stem mount is deceptively simple — just three parts: (1) The base that accepts the included (2) countersink bolt and is capped by a threaded, well, (3) cap. I could have machined the two housing halves from Delrin using a lathe, but that would have taken a full day of trial and error, would cost me almost as much in material, and I’d end up with something not nearly as refined as this inexpensive, off-the-shelf, purpose-designed solution.

Is it indeed weather proof? I haven’t tested that aspect, but I suspect, yes, it is. The threads that join the two halves are exquisitely fine and mate perfectly. The male threads are on the base so are covered, thus shielded, by the female threads when in place, which forms an effective drip ledge. Sure, water would eventually get in if it was submerged, but if the bike and I go under, I’ve got bigger problems than a dead AirTag. But rain? Yeah, that’s not getting in.

How does it look on the bike? Kind of great, actually, as stem caps go. But I doubt you’d notice it, because its color matches the black spacers underneath. And that’s the point. If I need that AirTag, it won’t be because I forgot where I parked the bike. Okay, someday that might be the case, but today, it’ll be because some rat-so-and-so stole my bike, and if that happens, I’d prefer they not notice the stem cap sporting an AirTag. At least until the police and I get there and show them how we found them.

If you value your bike and its stem accepts this style of cap — and you do, and it does — you need this. Oh, and in case you’re wondering, I’ve hidden a second AirTag on the bike, but I’m not going to share where.

Hope this helps. Clear skies!

Aluminum Bicycle Water Bottle Cage - Right Side Cage

TomInTheSky

Rock solid and lighter than expected

My wife's MTB really needed a bottle cage, but her bike's frame has a design where all of the other cages we had wouldn't work: we needed a side-entry cage. A lot of modern mountain bikes have smaller frame triangles, so I suspect we weren't alone with this issue.

Enter this side-entry cage. It's been great so far! Right hand entry works great with all of our standard bottles. I thought the aluminum construction would be great for durability, but I was worried it would be heavier... a relatively unfounded concern in the end, as the cage felt hardly heavier than plastic cages, and is still lighter than some other old-school cages we have on other bikes.

Aluminum Bicycle Water Bottle Cage - Center Cage Entry

Aaron Fanling

Replace her cheap plastic holders with these nice metal blue frame holders

We had some cheaper plastic bottle holders that worked just fine but we wanted something better and matched the paint job on our e-Bikes.

These holders are very lightweight and look fantastic. Don't fret at first if they seem too tight on your bottles. All we had to do was bend them open a little bit to the tightness that was perfect on the bottle, allowing us to pull the bottle and reinsert it with no problem yet keeping it from grip on the bottle.

Definitely happy with these bottle holders.

Aluminum Bicycle Water Bottle Cage - Center Cage Entry

James Kitster

Very sturdy, and very secure

These water bottle cages are a big step up from the standard wire cages, or even the step up plastic cages you see on lots of bikes nowadays. First off, they are VERY well crafted. The punched and molded aluminum feels extremely sturdy, with just enough flex to allow adding or removing a bottle. They are more than stiff enough to hold the water bottle in VERY securely, and I have no concerns of the bottle popping out on hard riding. The anodized (or is it powder coated?) finish is not only beautiful to look at, but bonded very strong as well. This will retain its luster forever. At about $8.50 each (with $4 coupon at time of writing), these are a fantastic value compared to anything you would get at a store. Very happy with these bottle holders!

Aluminum Bicycle Water Bottle Cage - Center Cage Entry

Michael Vassely

NO FRILLS SOLID CHOICE

These are no frills, minimalist, and very light weight top-load bottle cages. They are quite strong, and hold a standard-sized bottle securely. Just a couple of minor negatives. First, one of my pair arrived with a couple of small chips in the anodized finish, revealing the bright aluminum below. So I took a knife to try to cut into them some more, and found them to be fairly hard, but they will scratch. Over time expect to pick up an occasional blemish, but nothing out of the ordinary. Second, the same pair with the blemishes was also slightly out of round (not by much—just two or three millimeters). Third, they do require the use of low profile cage bolts, because most high ones will protrude enough so they interfere with a bottle. Corki includes silver low profile cage bolts with this item, so not a bit deal. But if you want black bolts to match the cage you will have to supply your own.

In sum, they are certainly a good product. Whether to choose these versus the myriad other bottle cages out there likely comes down to price and style. The price seems competitive, at fifteen dollars for two cages. The style question is for you to decide, but I think they will generally look more at home on a sleek road bike versus a beefy mountain bike.

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Corki Cycles Blog

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Pedal Power: The Best Bicycle Pedal Options for Road & Mountain Bikes

Understanding Suspension Components: Upgrading Your Mountain Bike's Performance

Choosing the Right Handlebars for Your Road Bike: A Buyer's Guide

Bicycle Saddles: Finding the Perfect Fit for Enhanced Comfort

Components

Tools

Accessories

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