Using an Inner Tube as a Knife Mount: Conclusions

| March 6, 2017 | 0 Comments

This post serves as the end of my experimentation of using a bicycle inner tube to mount a knife to my belt. You can read the original post here, as well as my follow up once I started force on force training with it.

Final Evaluations

I continued to use the bike tube + retention line for several more force on force events, including opposed drilling and scenario based training.

My friend and coach Cecil Burch of Immediate Action Combatives contacted me after my second article and suggested I try drawing the knife when I couldn’t move my arm enough for the cord to take affect.  I went to our monthly Shivworks alumni meeting and tested it with one of my training partners.

My partner is a little bit taller, about 40 pounds heavier, and works with his hands for a living. He’s way stronger than I am, especially in the sandwich clamp department. He’s also a graduate of Ed’s Manifesto’s Weaponology class. He knew what I was trying to do, and was trying to stop me.

I started on the floor, on my left side, and he had me in side control. I pummeled under his arm with my left arm, grabbed the bulbed hilt of the Clinch Pick, and raised my hips away from the floor.

I had hoped that the sheath would come out of the tube, but it didn’t. The training blade came free. We wrassled from there.

In continued testing, I could “uncork” the blade if I could move my hips enough, but with a (much) heavier opponent I don’t know if this is a reliable method.

I agree with Cecil that this method of carry suffers if the sheath comes clear of the bike tube and my body can’t move enough to active the cord. I got rid of the “stuck” sheath twice before going to the retention cord backup, but the important detail here (and Cecil’s point) is that it isn’t 100% reliable under all circumstances.

The most recent usage was in the tailgunner FoF scenario where my gun jammed. I drew my Clinch Pick with my left hand and attempted to close with the tailgunner after being shot a bunch of times.


I don’t recommend the bike tube in lieu of a formal holster and mounting system. However, I have carried, practiced, and trained with it enough that I am comfortable doing it “for real” when a traditional tool and mount isn’t available.

I will use this strategy when I travel and can’t take my gun(s):

  1. Go to general purpose store (like Wal-Mart or Target)
  2. Purchase
    • fruit knife
    • bottle of water
    • shoelace (or paracord, or fishing line)
    • bike inner tube
    • piece of fruit
    • lighter
  3. Drink water. As Caleb Causey of Lone Star Medics says, STAY HYDRATED
  4. Cut water bottle with knife. Use lighter to melt sheath for knife blade. Cut hole for retention cord.
  5. Cut bike tube with knife. Slide belt through tube.
  6. Eat fruit, because fruit is tasty


About the Author:

Short Barrel Shepherd Short Barrel Shepherd is a regular guy and works to make Web sites and mobile apps easier for people to use. He spends his free time attending fight-focused firearm, knife, and combatives training, motorcycling, writing, and playing games. His daily carry is a Glock 19 pistol and an AR15 .300 Blackout pistol in a backpack.

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