this post was submitted on 20 Oct 2024
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Why Kuwait Stores 7 Million Tires! - YouTube (youtube.com)
submitted 2 weeks ago by sabreW4K3@lazysoci.al to c/climate@slrpnk.net
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Honestly this is why I'm so into the idea of airless tires. Everyone just happily ignores this waste and I don't get it

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[–] Successful_Try543@feddit.org 6 points 2 weeks ago (4 children)

Actually, the manufacturers claim the opposite:

About 90% of energy loss from tire rolling resistance comes from repeated changes in the shape of the tries as they roll. By simplifying the structure of the tire, Bridgestone was able to minimize the energy loss in these “air free concept tires.” As a result, these tires have the same level of low rolling resistance as Bridgestone pneumatic fuel efficient Ecopia tires, contributing to reductions in CO2 emissions.

https://www.bridgestonetire.com/learn/tire-technology/airless-concept-tires/#

[–] GissaMittJobb@lemmy.ml 5 points 2 weeks ago (3 children)

I see. Is price the current limiting factor, in that case?

The reason I'm asking is that if this is actually true and ready for deployment, it would be adopted by every single competing cyclist in the world - they are crazy about managing efficiency and removing the possibility of getting a flat would be even more valuable.

Hence there's something missing, however I don't know what.

[–] Successful_Try543@feddit.org 1 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

Probably it's the missing possibility to tweak the stiffness or rigidity according to ones special demands. An air filled tire offers this possibly to adjust the driving behaviour by elevating or decreasing the pressure. These airless tires don't, which is good for a car driven on road, but isn't for bikes where the setup is usually adjusted to the demands of the driver.

[–] GissaMittJobb@lemmy.ml 1 points 2 weeks ago (1 children)

I'm not entirely convinced of this being the case. Adjusting tyre pressure is something that is always looked at quite seriously by pro cycling teams, but it's not going to be something that would be impossible to overcome by just buying several more tyres to have the desired range of properties available for the conditions of any given race.

Regardless, this will be an interesting space to follow in the future.

[–] Successful_Try543@feddit.org 1 points 2 weeks ago* (last edited 2 weeks ago)

Ah, OK. I was more thinking of mountain biking and related stuff. I didn't know that punctuation of tires still is a thing in (street) cycling.

However, I assume an airless tire for biking should have the same round cross section like an air filled bike tire, while the car tires both have a rectangular cross section. Thus the tires for biking need to be constructed differently. The one I've found is from Schwalbe and is basically a usual tire filled with a PU having a similar stiffness than a common tire with an air pressure of 3.5 bar. Currently, they don't have a system for racing yet.