Review | Tannus Armour – Inner Tubes Ain’t Dead

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If you’re still running tubes, this Tannus Armour will give you a little more protection on the trail.

Tubes. The thing I always carry on rides, but haven’t had to use in years. I never bothered with tubeless when I lived somewhere flat, with trails made primarily of dirt. Some years ago, after moving to the rocky wastes of West Yorkshire, that lasted about a month before I and all my mountain bikes were permanently converted. This past year, even test bikes have started arriving set up tubeless rather than tubed.

I know you’re out there though: tubeless refuseniks. The Not Tubeless Ready. Hardcore rubber fanatics. You’re out there, running your 40PSI tyres and this Tannus Armour may just open up some options for you to experience the joys of lower pressures and the reduced rolling resistance they can provide off road.

Tannus Armour Specification

  • Price: £29.99 per end
  • Weight: 312g

Fitting

“As quick and easy as fitting a regular tire” and “40 seconds”, proclaims the back of the box. In the box, you’ll find just a single piece of foam, for which you’ll need to provide your own inner tube.

The installation steps, helpfully embossed on the side of the insert, are to pump the tube up slightly, put it in the Tannus Armour, put that lot in the tyre, then mount it all on the rim at once. In my case, I also had to dry the rim and scrub sealant residue out of the tyre too.

Tannus Armour
7000km of guarantee

Depending on your tyre width, you might also need to trim the insert, for which there’s a size chart on the box and cut lines printed on the insert. Kind of like the shoe size printed on some replacement insoles.

Tannus Armour
Cut lines, like inner soles.

Despite the panoply of tricks I’ve learned from testing so many inserts over the past four years, at first I had a deeply terrible time fitting Tannus Armour. It was for one single reason: a 25mm internal width rim. A measurement that goes for a lot of rims and wheelsets from a few years back – while not ultra-modern in a world of 30 – 35mm internal widths, it’s still not that narrow a rim size.

I started out with a fairly burly tyre, but after this much experience fitting inserts, could tell how badly that was going to go and switched to a much more pliable 2.4in Onza Ibex. Even then, it took about 40 minutes, half a dozen zip ties, and some soapy water. Then the tyre went up very inconsistently and needed a ride round the block before the bead would seat uniformly.

Tannus Armour
Difficult to fit on narrower rims.

Take two: an identical tyre, but with a 35mm internal width rim. Suddenly, it’s all fine and goes together easily. Not quite forty seconds, but a few minutes tops. First ride out, I realised I’d put the tyre on backwards, and not only could I remove the beads by hand, but getting the tyre off, flipping it, and reinstalling with the Tannus Armour took about four minutes, including letting the tube down and pumping it back up.

So, if you’re going to go for Tannus Armour, I’d recommend you have wide rims. Those wide-for-2014-but-not-so-much-now ones are going to be hell to work with. I cannot stress enough how easy this was with a wide rim, and what hand-wrecking nightmare fuel it was with a narrower one.

Tannus Armour
Will it go?
Tannus Armour
Looking good?

I fitted and removed this several times during the test. The last time, I tried removing and refitting leaving one tyre bead on, and sure enough, stuffing the tube and insert assembly in one piece at a time worked just as well, if not a bit faster, than fitting it as Tannus advises.

Tannus Armour
Refitting with one bead done.

Untrimmed, these inserts came in around 312g, which is very close to their claimed weight of 310g for a 27.5in, 2.1 – 2.5 sized insert. That’s also relatively heavy compared to most tubeless inserts, which on average seem to range from 100-250g. That said, I only noticed the extra wheel weight when picking up a silly-light enduro bike that’s mostly carbon fibre.

Finding the desired pressure to pump it up to took a bit of trial and error, which I sorted out mainly by riding.

The Ride

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Review Info

Brand:Tannus
Product:Tannus Armour
From:moorelarge.co.uk
Price:£29.99 per end
Tested:by David Hayward for 1 month

David Hayward

Singletrack Contributor

David started mountain biking in the 90’s, by which he means “Ineptly jumping a Saracen Kili Racer off anything available in a nearby industrial estate”. After growing up and living in some extremely flat places, David moved to Yorkshire specifically for the mountain biking. This felt like a horrible mistake at first, because the hills are so steep, but you get used to them pretty quickly.

Previously, David trifled with road and BMX, but mountain bikes always won. He’s most at peace battering down a rough trail, quietly fixing everything that does to a bike, or trying to figure out if that one click of compression damping has made things marginally better or worse. The inept jumping continues to this day.

Comments (8)

    I’ve fitted these in my gravel bike – and very impressed with them so far. I was getting constant puntures in WTB Resolutes (700x42c) whether run tubed or tubeless. Obviously they were significantly better when run tubeless but I felt that the whole setup had become squirmy and I wasn’t running a much lower pressure in the tubeless set up to avoid that. Gave these ago and I’ve found my sweetspot with that tyre, running 20 front 25 rear. Tyre retains it’s shape nicely, with enough deformation to grip well, and zero punctures so far. The rims are WTB i25s, and unlike the reviewer, I had no problems mounting everything and getting the tyre seated. That might be because they’re a smaller insert and tyre combo though, but the rim width wasn’t an issue for me.

    Useful timing – I’d asked about these on the forum a few months ago (https://singletrackworld.com/forum/topic/tannus-armour-tyre-insert-anyone-tried-them/) and finally ordered them last week.

    Planning to fit them tonight. 700×47 / 700×42 CX tyres on my commuter using 20mm internal width rims, so hopefully no issues. Tyres I use aren’t tubeless compatible so I’m hoping these help prevent some of the thorn punctures.

    just fitted one this evening to the rear tyre on the ‘e’bike. lets hope for less punctures than with tubeless..!

    I purchased this product because I was intrigued by the idea of additional rim protection on my do it all bike. Over 20 years I’ve blown up many wheels on a yearly basis riding and racing downhill and now that I no longer race and ride exclusively a ~180mm bike it seemed like a good idea to use an insert to preserve my wheels to some extent for the random day riding downhill trails. The inserts were paired with some 1100 gram 2.5″ width casing tires which were my “trail” tires at the time.

    I aired up the tires to around 25 psi as a starting point as I normally need to be around 30 psi to prevent casing roll and collapse on hard corners and berms when riding downhill. As a frame of reference I’m around 180 lbs. My initial impression after riding down some “park” trails was that my wheels were a heck of a lot heavier, slower, and perhaps damped although that may just have been the affect of all the additional mass of the system.

    I then took my bike down to a downhill trail and within 50 yards of entering the woods my rear tire had a flat. In the parking lot I pulled off the tire and found that I had a double pinch flat in the tube. I replaced it with another tube and proceeded to a less of a downhill trail and more to a rocky enduro type trail where a little less bike is more ideal due to the grade. I perhaps got about 100 yards into the woods for this trail before again, I got a rear pinch flat.

    The inserts were removed from the bike that evening. From here on out downhill tires are the compromise I make if I want to ride a bike fast down a hill. I cannot stress enough how underwhelming this product was.

    no flat tyre for me today….

    “In the parking lot I pulled off the tire and found that I had a double pinch flat in the tube. ”

    Did you really expect this product to protect against pinch flats? It’s obviously puncture protection.

    Upon hindsight, I should have realized this because 1mm of sidewall foam ain’t gonna do isht. However I would suggest going to the Tannus website. There’s a lot of marketing ‘bark’ that it does prevent pinch flats.

    I ride reasonably hard and based on my experience, this product doesn’t really have a place in the market. It’ll make a quasi robust tire far heavier than the heaviest DH rubbers on the market and if it doesn’t prevent pinch flats or rim damage, then what’s the point? Puncture protection? Perhaps there’s some niche environments where there’s obsidian arrowhead rocks that can leave unseal-able sized tread punctures in the most robust of tires. In which case this could be an option, although this type of terrain also tends to cause pinched as well….

    Not to be overly dogmatic, but most riders would probably benefit more from purchasing a proper tire whereby the additional weight of their pool noodle is instead invested in a heavier tire.

    @inclag thanks for your experiences. I did get a few rim noises without pinch flats when running these, but it makes sense this might be more susceptible to them. Ultimately there’s still a tube getting squashed in there.

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