The new Gaadi two-end tubes look like a very good idea if you use an electric hub motor or internal geared hub in your cycle. Being able to quickly change the tube without opening the axle nuts or fiddling with torque arms in case of a flat, sounds pretty intriguing.
Judging by the many different tube sizes Gaadi offers, they obviously like you to choose a tube that fits your tyre width best. I did that. The Gaadi 50/57-559 tube size looked like the right fit for my 55-559 Schwalbe Big Ben (that would be a 2.15″ wide tyre , for the metrical impaired).
Today I’ve tried mounting a 26″ Big Ben tyre with a 26″ Gaadi tube on a spare 26″ rim. This image shows how the tube supposed to sit inside the tyre:
Even after several attempts I couldn’t mount the Gaadi tube without ending up with a clearly visible gap between the tube ends inside the tyre at my usual tyre pressure of 2-2.5 bar (29-36 psi). Not convincing…
In case of using it in a tadpole trike or velomobile, where a blown-out rear tyre tube at some speed can lead to pretty severe accidents, not convincing at all!
First of all, mounting the Gaadi tube might not be the simple, straightforward affair with a wide tyre, like the promo video suggests. Second, it might work if you choose a narrower tyre with stiffer side walls and higher tyre pressure. Like a Schwalbe Marathon or Marathon Plus.
After a short Google search I’ve found several threads in online cycling forums about customers complaining about Gaadi tubes failing at the tube ends. These Gaadi two-end tubes might not be the best invention since sliced bread. Patented or not. One might wonder why Schwalbe doesn’t offer a similar two-end tube…
I might do some further testing with narrower tyres, but I can’t see myself using Gaadi tubes in the rear tyres of my trikes. Not recomended for wide tyres.