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| Psi:
IMHO the main advanced of good tyres are - Less road noise - If you push things further than you should, or you just misjudge a corner or the road surface then you're much less likely to lose control and go off the road. I agree with nctnico, if you have good tyres you shouldn't be using them in the region where generic tyres would fail but where you're good tyres work totally fine. Their benefits should be there for when you accidently push things too hard or misjudge something. If you push them hard all the time then you're back in the same position where you run the risk of losing control if you accidently push them that tiny little bit more. |
| PlainName:
--- Quote from: nctnico on January 27, 2024, 10:26:33 pm --- --- Quote from: PlainName on January 27, 2024, 08:32:55 pm --- --- Quote --- A good tyre gives you extra margin when things go wrong to stop, especially so in poor conditions. --- End quote --- They should do, but only if you drive like you have shitty tyres on. Once you drive in a way that the good tyres let you, you've just moved the goalposts along a bit, but now when you are caught out it will be worse and you won't have had the practice in recovery. --- End quote --- This reasoning doesn't fly. It is not like you'll be driving twice as fast simply because there are speed limits. And there is something like common sense as well. About a year ago I found myself driving high up in the mountains in Switserland on a wet, windy mountain road while it was snowing a bit. No way I'm going to push the car to the limits in such a situation. In such situations I drive extra careful and let the locals I collect in the rear view mirror pass when possible. --- End quote --- "Risk compensation". You might not be driving twice as fast but you probably won't be leaving such a large gap to the car in front and stuff like that. There are lots of ways to exceed the capability of your motor other than flat out speed, you know :) My Golf goes like it's glued to the road (despite the cheap tyres) whereas a Dacia I have to drive wallows all over the place and is generally not as capable. So I drive it in an appropriate fashion and don't have any more risk of catastrophe than I do in the Golf. If one isn't able to stay within the limits of the vehicle I question if they should be allowed on the road - not all vehicles are super safe and forgiving of driver faults, after all, but many people nevertheless manage to not run them off the road or smash into things. |
| nctnico:
Again, it is not just about your own driver skills but the ability for the car to stay on the road if something unforeseen happens. |
| Siwastaja:
--- Quote from: PlainName on January 27, 2024, 09:38:43 pm ---If I had an EV, the very last thing I would want to be doing is micromanaging power saving. --- End quote --- Of course. It is the designer's job to "micromanage" such things. |
| AVGresponding:
--- Quote from: Marco on January 27, 2024, 05:04:10 pm --- --- Quote from: nctnico on January 27, 2024, 02:11:58 pm ---In the end your life / safety is worth more compared to saving a few bucks. --- End quote --- I doubt you can ignore vehicle weight for tire design, especially for aquaplaning. In the end everything is a compromise. --- End quote --- Ah yes, thank you for reminding me of the other major EV consideration; weight. So, if someone insists on using normal tyres on their EV, they need to choose a higher load index. Which means stiffer sidewalls, and more road noise. Back to square one... (almost) --- Quote from: tom66 on January 27, 2024, 08:48:07 pm --- --- Quote from: Siwastaja on January 27, 2024, 07:14:19 pm --- --- Quote from: tom66 on January 27, 2024, 10:12:55 am ---Since I'm rarely running on electric fumes, I don't need to eek out the last few percent. --- End quote --- This is the second time I hear this rationalization from you (the previous one was about in context of Leaf's slightly stupid preheat mode losing 1-2% of battery capacity), but I think about it in the exact opposite way: any energy saving gives you more margin against running on "electric fumes". As long as it doesn't involve too big sacrifice on buy price or safety, even 1-2% gains on efficiency are important. At the end of the day, I have somewhere I need to go, and if I had better preheat logic adding 2% and better tires adding 3% then I would arrive at the destination with maybe SoC=20%, which I would be much more comfortable with than 15% because, like you, I hate running on electric fumes. (Actually, 15% is the lowest SoC I have ever ran to on my Leaf, so I have no idea what happens at 0%.) --- End quote --- I get you, but I think like all things in engineering it has a balance. I would rather have a safer vehicle with better tyres and lose a bit more efficiency and consequentially have to charge for a minute longer on a road trip, than find myself with an airbag in my face having crashed into a ditch. I had a BMW i3 as a loan car whilst my prior GTE was being fixed, and found it to be unnervingly unstable at higher speeds. It has very skinny eco tyres as standard, which might be okay in summer, but would definitely feel dubious in wet weather. The moose test isn't that impressive. Tyre size 155/70R19 vs 215/50R19. --- End quote --- Narrower tyres give better wet performance, as they are less prone to aquaplaning. High speed instability is far more likely due to the greater side area/height:wheelbase/track ratio. |
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