Definitely an interesting product but I have some concerns with the type of off road riding I do.
They are not available in 26 x 2.25 yet. Considering the mounting difficulty with the 26 x 1.75, larger sizes may be next to impossible.
I'm concerned the tread may not be suitable for gravel.
Durability may also be a concern. At 5000 miles, I would need to replace them every season. Not something I would look forward to doing once a year.
So far, I haven't had any flats with my Tannus inserts. I'm not sure the fairly small added protection offered by their airless product would be worth the mounting hassle.
Thanks for posting though, I'm also interested in your review.
I have 1.75 on the front of this bike already, the Tannus replaced a 2.00 on the rear.
The tire came with a couple disclaimers that I didn't see on their web site that sound like CYA disclaimers and other lawyer boilerplate
- this product is recommended for paved road use only ... please refrain from use on gravel or grass, as this may not provide sufficient traction
- the Tannus Airless Tire has a structural weight limit of 165lbs...This means that the combined weight of the bicycle and the rider, including all accessories and equipment, may not exceed 330lbs
- they mention a 60 mile break in period. The tire feels somewhat slick, maybe from moulding release agents that should wear off - FWIW motorcycle tires need break in also
- one of the two package inserts states that the warranty is 5000 KM OR 2 years, whichever comes first, another insert states warranty is 5000 miles
None of this would have stopped me from purchasing but it seems to me that the disclaimers should be prominently posted on the web site product description.
By the way, I've installed several difficult motorcycle tires and of course some bike tires are more difficult than others but this Tannus airless tire rivals the most difficult motorcycle tire that I've installed. The video I linked seems to be from a bike store and at the end he states he isn't sure that he would sell the product. Depending on my experience with this tire I would consider it on other bikes and expect that thinner, larger diameter tires would be much easier to mount on a rim - as seen on other videos with 700c tires.
I have Tannus Armour in Schwalbe G one 700x40c tires on my gravel bike. I've had a couple flats with the insert but several flats without them. For this bike I wanted a tire with no chance for flats on the rear hub motor wheel.