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Post by Joepublic on Jan 15, 2023 12:07:10 GMT 1
michelinmedia.com/michelin-uptis/"MICHELIN UPTIS is the first airless tyre to be used in real traffic! DHL in Singapore is now running puncture-proof – with the MICHELIN UPTIS, our innovative, airless tyre. By the end of 2023, we will equip around 50 DHL delivery vehicles in Singapore with our new UPTIS and start the endurance test! 💪 What's special about it? The MICHELIN UPTIS combines robustness, driving comfort and safety. We want to use it to optimise the productivity and availability of DHL vehicles and reduce tyre problems and consumption. The pilot project is an important step on the way to a fully sustainable tyre in 2050! We are pleased that we can continue to advance this development together with DHL!"
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remmington
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Post by remmington on Jan 15, 2023 12:13:58 GMT 1
That looks fun to mount on the special rim (or does it come with the rim). First glance - what happens when it mud in it - does it still work or prematurely wear? The don't call me a "ludite" for nothing... I can see the advantage in an airless tyre thou!
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Post by Joepublic on Jan 15, 2023 13:56:53 GMT 1
That looks fun to mount on the special rim (or does it come with the rim). First glance - what happens when it mud in it - does it still work or prematurely wear? The don't call me a "ludite" for nothing... I can see the advantage in an airless tyre thou! I’d imagine it would be stretched over the rim like a stretchy boot cv? They’ve been missing around with airless tyre for 25 year (Michelin Tweel), as far as I’m aware this is the first to be tested in the real world.
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remmington
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Post by remmington on Jan 15, 2023 14:27:55 GMT 1
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Post by trickydicky on Jan 20, 2023 1:07:57 GMT 1
It can't come soon enough for me, blo*dy sick of rescuing cars with no spare tyre or double punctures (where they have hit a pothole and ripped the sidewalls.
It will probably finish off the backstreet tyre cowboys eventually, so that's an added bonus 👍
The FIA should get involved and introduce it to F1 to speed things along 🤣
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remmington
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Post by remmington on Jan 20, 2023 8:35:53 GMT 1
It can't come soon enough for me, blo*dy sick of rescuing cars with no spare tyre or double punctures (where they have hit a pothole and ripped the sidewalls. It will probably finish off the backstreet tyre cowboys eventually, so that's an added bonus 👍 The FIA should get involved and introduce it to F1 to speed things along 🤣 I watched a program at the end of last year out the selling of part worn tyres. It even shocked me...
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Post by valhalla on Jan 25, 2023 1:08:44 GMT 1
I see that the Michelin Uptis is an "all-in-one" solution; the tyre and the rim are moulded as one piece, and need to be this way for the assembly to perform correctly.
What I cannot get any information about is this question (in my engineering mind): How do you compensate for front and rear wheels? I mean, at the moment, you set each axle up with a different pressure to provide the correct performance at the tyre. An all-in-one solution would either have to be a compromise front/rear, or you would need 2 different wheel designs on each car. I think?
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Post by Rhubarb on Jan 25, 2023 8:23:53 GMT 1
I see that the Michelin Uptis is an "all-in-one" solution; the tyre and the rim are moulded as one piece, and need to be this way for the assembly to perform correctly. What I cannot get any information about is this question (in my engineering mind): How do you compensate for front and rear wheels? I mean, at the moment, you set each axle up with a different pressure to provide the correct performance at the tyre. An all-in-one solution would either have to be a compromise front/rear, or you would need 2 different wheel designs on each car. I think?
Think of it as 30psi all around
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remmington
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Owns Spark Eroder
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Post by remmington on Jan 25, 2023 8:36:18 GMT 1
I see that the Michelin Uptis is an "all-in-one" solution; the tyre and the rim are moulded as one piece, and need to be this way for the assembly to perform correctly. What I cannot get any information about is this question (in my engineering mind): How do you compensate for front and rear wheels? I mean, at the moment, you set each axle up with a different pressure to provide the correct performance at the tyre. An all-in-one solution would either have to be a compromise front/rear, or you would need 2 different wheel designs on each car. I think?
Well if it is? An "all in one" solution - the idea has just died in my mind due to cost. Morphing from Ludite to pragmatist
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Post by givusaclue on Jan 25, 2023 12:55:59 GMT 1
retrofit progress, like my wheelbarrow wheel, hard ride though
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Post by trickydicky on Jan 27, 2023 2:38:57 GMT 1
I see that the Michelin Uptis is an "all-in-one" solution; the tyre and the rim are moulded as one piece, and need to be this way for the assembly to perform correctly. What I cannot get any information about is this question (in my engineering mind): How do you compensate for front and rear wheels? I mean, at the moment, you set each axle up with a different pressure to provide the correct performance at the tyre. An all-in-one solution would either have to be a compromise front/rear, or you would need 2 different wheel designs on each car. I think?
I doubt it will be a retrofit option, but generally car manufacturers will work with a tyre company to set up the chassis so they will just set up the car differently to suit the tyre.
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Post by OldGit on Jan 27, 2023 16:28:46 GMT 1
Tyre pressures on BEV's are generally the same all round, certainly on the twin motor ones. The vehicles themselves are relatively well balanced so the weight balance of putting self loading cargo on top of the battery isn't really changed. The pressures on the tyre placard are just 'high' and 'higher' all round, no front to back differential, whatever the load.
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Post by valhalla on Jan 27, 2023 20:57:04 GMT 1
The durability of the whole assembly would be the main concern for me, especially with the mass-disadvantage that all BEV's have over their IC counterparts. I can easily understand the logic of prioritising these sorts of things for new EV stock, especially with the (excellent) argument that they are better balanced front to rear.
Where these sorts of things have to work in on small, cheap, hire cars. Like all the FIAT 500's that get smashed-up wheels around this neck of the woods in the summer months - visitors from all over the world, all experiencing the delights of potholes and ditches that just eat little cars for breakfast, all over the Highland region.
We tend to see roughly as many smashed wheels as we see punctures on the hire-cars, sometimes because the eigits just don't stop, but mostly because the wheel goes just before the tyre, by a few milliseconds, being the last bit of spring left betwixt pothole/rock/stone and the strut top-mount. Some days, there will be up to three separate cars in an afternoon that will need rescuing by flatbed, just from one 2-mile stretch..... They don't have spare wheels, so they don't fix roadside, such is the stupidity of the car/hire companies involved. The danger would be with Uptis sort of systems, scrooge-like management-types will argue that they definitely don't need a spare-wheel, and every manufacturer will have their own design/s, so nothing is going to fix in the future......
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Post by OldGit on Jan 27, 2023 21:35:37 GMT 1
To be honest, I think these wheel-tyre assemblies will be the longest lasting part of any BEV - I suppose they could even have the tread re-cut! Thankfully we have little involvement with hire stock, it's bad enough with the roundly abused Motab fleet...
This is the biggest hidden problem I can see coming with the drive to vehicles not actually being owned in the future - no-one will care about how they're driven, how people abuse vehicles they own is bad enough, once the 'its not mine' mindset (which is the polar opposite from how people used to treat things they didn't own) gains traction, lease cars will become just something else to leave out on bin day. That, and people just can't actually drive anymore without the car or street furniture guiding them.
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Post by upkeep on Feb 27, 2023 17:23:16 GMT 1
As with all these things there usually is a reason for it, and for industry insiders that know a huge amount more than the public do as they (The Government) are now looking at tyre and brake particulate emissions.
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