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DIY Ice Probe for fat biking

Cycling on ice can be hazardous or fatal! These ideas are presented entirely at your own risk and expense.

Fat bike sitting on thick older ice, with new thin ice and open water in the background.
DIY Ice Probe strapped to left side of top tube. Fat bike sitting on thick older ice, with new thin ice and open water in the background.

The Nordic ice skating community has developed specific tools for assessing ice thickness. Luc Mehl’s Wild Ice course (highly recommended) was the catalyst for this little project. This blog post is a DIY adaptation of an ice probe sized for carrying on and deployment from a fat bike; without interfering with other gear typically carried for winter camping. While this probe has so-far only had a few trips I’m very impressed with the timeliness and accuracy of the information it can provide.

Ice Probe with 20mm webbing strap attached to yield an effective length of about 160 cm, 60 inches.  The probe has been lightly tossed like a harpoon.  With the new 6 cm ice failing on the first toss.
Ice Probe with 20mm webbing strap attached to yield an effective length of about 160 cm, 60 inches. The probe has been lightly tossed like a harpoon. With the new 6 cm ice failing on the first toss.

The primary components of the ice probe are a shortened segment of aluminum Nordic ski pole, and a length of steel rod. Combined the weight is around 500 grams. Given the anticipated harsh service I opted for creating a single pole that does not extend or retract. The potential for unwanted corrosion of dissimilar metals is minimized (perhaps eliminated) by the separation of aluminum and steel with self-fusing heat shrink tubing around the steel rod. The steel rod is then driven inside the segment of ski pole.

Wouldn't be a Bikepackers Foundry item if there weren't at least two uses.  Ice probe, and bike stand, etc. :)
Wouldn’t be a Bikepackers Foundry item if there weren’t at least two uses. Ice probe, and bike stand, etc. 🙂
A brief video of how I’m using and carrying the ice probe.

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