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> with their increased weight and powerful torque, they produce a lot more tyre pollution than ICE vehicles. This has been shown not to be true in a number of
by djaychela 2y ago
> with their increased weight and powerful torque, they produce a lot more tyre pollution than ICE vehicles.
This has been shown not to be true in a number of studies.
- prododev 2y agoCan you share them? Because physics says that damage to roads scales quadratically with weight. Not sure why tires would not experience a similar increase. At the very least, these tires are subject to higher forces due to the heavier weights of EVs. Intuitively, consistently applying higher friction forces to an object would cause higher wear.
- uxp100 2y agoThe weights aren’t really that much higher than ICE cars, but I don’t think anyone who has owned an EV would say they don’t go through tires faster. They do. How much due to weight, how much due to better acceleration, I don’t know, but they definitely are harder on tires.
- Schiendelman 2y agoThree or four years ago, yes. Newer EV specific tires don't seem to be wearing faster.
- uxp100 2y agoUnfortunately Nissan did not put such a tire on my Ariya. Good range and very quiet but very soft and only 9/32 from factory means lots of people have to replace em after 15 to 20k. I’m replacing earlier given poor snow and rain performance. They can have em back when my lease is up.
- Schiendelman 2y agoUnderstood, but that's Nissan sucking.
- marzell 2y agoSome factors I think are involved, but I don't see mentioned - EVs produce more readily available torque in general, and also tire choice heavily factors in EV range (low rolling resistance), which has a negative impact on tread life
- 93po 2y agoEVs use different tires from the factory than regular cars to help increase efficiency, maybe it's about the type of tire?
- uxp100 2y agoThat’s a factor too. My stock tires were quite soft, though they were a tire that was also used on non EVs in Nissans lineup.
- m463 2y agoI would imagine it's just tire formulation choices. Tractor trailers get extremely high mileage from their tires, but there is lots more weight on each tire. And train wheels... what is the load and mileage on those?
- reshlo 2y ago> damage to roads scales quadratically with weight It’s much worse, it actually scales quartically with weight. https://en.wikipedia.org/wiki/Fourth_power_law https://en.wikipedia.org/wiki/Fourth_power_law
- ComputerGuru 2y agoEvery study I've seen concurs that EVs chew through tires faster than their equivalent ICE vehicle, and generate more tire particulate matter accordingly. The reasons (torque and weight) are unambiguously greater in an equivalent EV vs ICE. EVs do generate lower brake particulate matter, by virtue of not using them as much (otherwise they'd also be prone to generating more in a (faulty) per-engagement direct comparison). Could you link these studies?
- actionfromafar 2y agoStudies are always good, but it almost trivially follows that the tread loss must go somewhere.
- Schiendelman 2y agoEV specific tires have basically eliminated the difference in tread loss already. And because there's public pressure on this, the toxicity of the materials and tires is decreasing rapidly. Every study I've seen from people pushing on this uses very old information about tires, proving there's a problem really requires updated work taking these things into consideration.
- Scoundreller 2y agoCan I put these EV specific tires on my ICE to get super-duper tread life? (and have the tire companies been conspiring to make tires disposable?)
- Schiendelman 2y agoYes, and yes. Though with a lower mass vehicle you may have reduced grip.
- benlivengood 2y agoGrip is proportional to downforce times the coefficients of friction. Since downforce comes mostly from vehicle weight the maximum available acceleration/deceleration (grip) is nearly identical across lighter and heavier vehicles for a given tire compound and tread pattern. The complexity comes from things like sidewall stiffness (controls available grip near the lateral limit of traction, must be designed for vehicle mass), suspension geometry (tire camber affects maximum grip), tire width (affects contact patch size relative to mass of the vehicle, tire pressure, camber, and sidewall stiffness), and suspension spring rate and dampening (wheel hop, changing camber angle from body roll).
- lightedman 2y agoIt is absolutely true when you add in the road wear and particulate matter from that caused by heavier EVs.