EV tyres. Make me smart

Rroff said:
At least on the SUV type EVs slightly stiffer sidewalls and better rolling efficiency are not insignificant factors. Driving heavier, taller, vehicles with plenty of torque you'll start to really hate tyres with too soft sidewalls if/once you've experience of the difference side by side.

Although it can't touch their 0-60 times, people forget even the old Nissan Leaf can match or beat most performance ICE cars 0-30, unless you have quite fine accelerator control pulling away even "normally" in an EV is more demanding on the tyres.
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The other thing that occurred to me is that my model 3 is 'normal' car weight, some of the others are almost a ton more.

^the downside to less rolling resistance is generally less grip which is fine, until it isn't (when you need to perform a quick maneuver).
 
Simon said:
An EV has instant torque and ‘revs’to 15k-20k too so they are still relatively short geared. They kill tyres which is why my cupra born needs new tyres at 15k but my M3 did 25k with twice the power

EV tyres are mainly about efficiency
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This was my understanding also.

My Zoe came with Michelin EV tyres, I replaced them with cross climates when they wore out and didn't notice any difference in range/noise.

My eNiro came with standard Primacy 3, I've replaced the rears with Hankook all seasons (can't remember the exact model number), no difference in noise, maybe a slight drop in efficiency (but I fitted them in October, so could just coincide with colder weather).
 
There are a lot of factors that affect tyres, source, my uncle was technical director of one of the well known tyre companies until he retired.
I used to talk to him quite a lot, got burned a few times early on when as a cocky 20 or so year old I thought I knew all about tyres from reading magazines.

Every tyre is a balance between factors.
A lot of people ignore load rating (the number around 95-105 at the end) but that will be important for EVs compared to ICE cars many have driven where for most cars the rating will be higher than they need.
EV tyres will be tweaked to efficiency but then its a high factor on most tyres now as well so its probably less marked than it would have been 15 years or so ago. (Assuming your buying modern designs and not cheaper old ones).
 
r22snapper said:
The torque delivery of an EV is a lot kinder than that of an ICE, don't forget that a gearbox acts as a torque multiplier so absent weight issues tyres have an easier time on an EV than an equivalently powerful ICE.
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From Michelin:

"Although tire wear happens the most when cars are going faster, breaking or making sharp turns, all tires shred tiny particles every time they rotate. According to Michelin, tires on electric vehicles wear out 20% faster than on internal combustion vehicles."
 
Grim5 said:
"Although tire wear happens the most when cars are going faster, breaking or making sharp turns, all tires shred tiny particles every time they rotate. According to Michelin, tires on electric vehicles wear out 20% faster than on internal combustion vehicles."
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can all be the weight and the additional abrasion when braking(e: & cornering), even if ev gearless motor applies more uniform torque without higher peaks seen on ice, when accelerating.

e2: what is the wear rate on hgv tyres, scania, even though they are driven more smoothly
 
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Nasher said:
Low rolling resistance is ok as long as you remember the tyres just won't grip very well in the wet, so drive accordingly. Stopping distance will be longer too.
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This is not the case at all, it is tyre dependent as always but things like the hankook ION and e'primacy have good rolling resistance and in tests bettered michelin PS4 and Conti sport 7 in the wet braking test, of course fell over in other areas but tyres are a complicated thing with different targets but the assumption shouldn't be that low rolling resistance = rubbish.

SDK^ said:
Pirelli have developed special tyres for the BMW iX - Pirelli P Zero Elect, with a focus on low rolling resistance, a revised shape to help aero and it uses Pirelli Noise Cancelling System (PNCS).
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I had the PZ4 NCS Elect on my car, grip was fantastic for a 2.2 tonne tank, but suffered 3 failures (bulges, blowout, puncture etc) in very short space of time, at the time I put this down to bad roads we travel on and pot holes, took the decision to downsize from 22 to 20 inch rims, I put went for PZ4 again, not realizing I forget the NCS bit so got the standard sports tyre, what a difference, hard as F*& sidewalls, economy/range went down noticeably but car handling improved significantly, completely different tyre pattern and construction, I did not realize a few simple letters on the side of a tyre could mean so much on the same model tyre! So in our case I reckon the failures had more to do with soft sidewall of the NCS and very little profile at 265/35/22.
 
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Nasher said:
Low rolling resistance is ok as long as you remember the tyres just won't grip very well in the wet, so drive accordingly. Stopping distance will be longer too.
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Hello I’d like to make stuff up again…

#Mash report.

The low rolling resistance tyres on my IPACE are frankly comedy how much grip they have in any weather. It’s like a limpet, tyre wall deflection is very different to tyre compound friction.
 
SDK^ said:
The tyres on my iX are 275/40/22, so a little more side profile and the comfort is actually very plush :)
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Yup have to agree the 22s running PZ4 NCS were more comfortable than the 20s PZ4 Sports tyre on mine most likely due to its softer sidewall, very good, but I think too little profile in my spec for where we driving, a 275/40 is certainly a lot more sidewall.

Was considering fitting them again in 20s but when I read through tyre reviews there are loads of complaints of bulges on the NCS, so I was not alone.
 
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Jonnycoupe said:
Hello I’d like to make stuff up again…

#Mash report.

The low rolling resistance tyres on my IPACE are frankly comedy how much grip they have in any weather. It’s like a limpet, tyre wall deflection is very different to tyre compound friction.
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You can't beat physics. You basically either have a high friction and lots of grip or low friction and less grip. Stop talking crap again.

The lower grip in the wet is very noticeable on these eco tyres.
 
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Skoda Kodiaq fronts needed replacement at 8000miles Pirelli

Skoda Enyaq 12000miles still ok Bridgestone

There are people running factory fitted tyres on Enyaq beyond 25k mark

Tho I think all season tyre would be a massive benefit. Bridgestone or Michelin with decent rolling resistance.
 
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Nasher said:
You can't beat physics. You basically either have a high friction and lots of grip or low friction and less grip. Stop talking crap again.

The lower grip in the wet is very noticeable on these eco tyres.
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You are confusing two very different attributes of a tyre with a generic school boy interpretation. This should not be unexpected I guess.

Friction and grip are the same thing! Rolling resistance is something totally different.
 
Jonnycoupe said:
You are confusing two very different attributes of a tyre with a generic school boy interpretation. This should not be unexpected I guess.

Friction and grip are the same thing! Rolling resistance is something totally different.
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Rolling resistance IS friction. Otherwise known as rolling friction lol. There is always going to be a trade-off. If you want better efficiency the tyres will have to have less friction against the road surface.
 
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The word you are looking for is deformation, this is wasted energy when the tread moves or sidewall flexes.

Friction is mechanical grip which only matters when you are trying to accelerate (in many definitions of the term)
 
Nasher said:
Rolling resistance IS friction. Otherwise known as rolling friction lol. There is always going to be a trade-off. If you want better efficiency the tyres will have to have less friction against the road surface.
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Trains have low rolling resistance and the steel wheels have low grip… how does that work then.

Problem is you could learn here but you argue for the sake of it like a petulant little child.
 
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Jonnycoupe said:
Trains have low rolling resistance and the steel wheels have low grip… how does that work then.

Problem is you could learn here but you argue for the sake of it like a petulant little child.
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And it takes miles to speed up and slow down. They can't grip if there is a leaf on the line...
 
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