Later On

A blog written for those whose interests more or less match mine.

Airless tires: Getting closer

leave a comment »

Loz Blain reports in NewAtlas:

We’ve been reporting on Michelin’s airless tire technology for more than 16 years now. Indeed, the first time we wrote about the “Tweel” back in 2005, it quickly became the most popular story ever for what was then called gizmag.com.

The advantages are pretty clear: firstly, you can never be brought to a stop by a puncture or blowout – Michelin says about 200 million tires every year hit scrapyards early thanks to these. Secondly, you don’t have to look after your tire pressures; that doesn’t just save you time, it also eliminates all early wear caused by underinflation.

Their internal spokes are hugely tunable to meet desired performance characteristics. You can individually tune their stiffness under acceleration, braking, cornering and bump handling forces. The bump handling characteristics can even be tuned to eliminate the need for separate suspension in some types of vehicles.

You can poke holes right through the tread to let water escape, potentially creating much better resistance to aquaplaning. They take less raw material and less energy to make, making them better for the environment, and Michelin has estimated they’ll last up to three times as long as a regular ol’ hoop.

They have obviously not been easy to commercialize, though; 16 years and counting is a long and difficult birth for a product people are clearly interested in. The Tweel, which replaces the entire wheel assembly, has been available for some time for various off-road vehicles, but it’s still yet to make it to the road.

Michelin has teamed up with GM to design and start selling an airless tire for street use on passenger cars. Called Uptis, this product is a full-wheel solution requiring specialized rims. Michelin says it will withstand much greater impacts than a regular tire and wheel, and will have a “dramatically” longer lifespan, while adding no extra rolling resistance, not feeling any different to the driver and adding only around seven percent to the weight of the wheel – less than existing run-flat tires do.

GM will begin offering Uptis as an option on . . .

Continue reading.

Written by Leisureguy

14 September 2021 at 10:35 am

Posted in Daily life, Technology

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: