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Tesla is recalling its cheaper Cybertruck because the wheels might fall off

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Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#291

Post by cucumber3732842 »

saalweachter wrote: post #270
cucumber3732842 wrote: post #255

Earlier quoted context omitted.

>A FWD vehicle with snow tires is frequently better in the snow than an AWD without snow tires. Better control, better stopping, better uphill on snowy roads. Control and stopping of course, but I'd love to see the justification behind "better uphill" Napkin math says that doubling the contact patch over which the motive force applies still wins because snow tires aren't going to double your friction coefficient. And…

Snow tires can actually double your coefficient of friction on snowy pavement! The coefficient of friction drops fast on snowy ground, with all season dropping as low as 1/3-1/4 of their dry value. Of course, snow tires plus AWD is even better, but I find snow tires on a FWD vehicle to be plenty to drive up steep hills in snowy weather. (Before learning of the wonders of snow tires, I used to have to take different r…

>Snow tires can actually double your coefficient of friction on snowy pavement!

Citation? Seems to good to be true. Maybe studded tires on the perfect ice.

>The coefficient of friction drops fast on snowy ground,

NickCageYouDontSay.jpg

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#292

Post by BobaFloutist »

alooPotato wrote: post #254
mrguyorama wrote: post #227

Earlier quoted context omitted.

You cannot be serious. It was trivial to do this back before foldable seats were standard. You can fit at least two bikes in just the shitty "trunk" space of your average minivan. Every van ever made has more cargo space than the Cybertruck.

maybe this is an HN thing, but how would you bring your kids/wife and 4 bikes inside a minivan?

Assuming you have 2 kids, you remove the back row of seats, leaving four seats, and you can just load the four bikes up side by side in the back.

Like a hatchback, but much bigger.

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#293

Post by vablings »

kgermino wrote: post #48
vablings wrote: post #14

Earlier quoted context omitted.

The RWD model was only for sale briefly after launch. I don't know why you would ever want a pure RWD electric truck

I don't see why it would be an issue in most cases. Obviously you'd want AWD for proper off-roading, but for just driving around on streets it should be fine. My EV van is RWD and it's totally fine in everything I've dealt with - including deep snow - and I really only even noticed when trying to parallel park on ice.

The biggest difference in AWD vs RWD cars to the average consumer is usually gas milage. In the case of electric cars this is largely unaffected because there is no active driveline components just an electric motor

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#294

Post by alooPotato »

BobaFloutist wrote: post #292
alooPotato wrote: post #254

Earlier quoted context omitted.

maybe this is an HN thing, but how would you bring your kids/wife and 4 bikes inside a minivan?

Assuming you have 2 kids, you remove the back row of seats, leaving four seats, and you can just load the four bikes up side by side in the back. Like a hatchback, but much bigger.

I don't get how that works - quick look online: https://preview.redd.it/team-minivan-who-is-with-me-v0-oxprg...

That's one bike, with only 3 available seats and the front tire taken off. How would you do 4?

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#295

Post by vablings »

cucumber3732842 wrote: post #291
saalweachter wrote: post #270

Earlier quoted context omitted.

Snow tires can actually double your coefficient of friction on snowy pavement! The coefficient of friction drops fast on snowy ground, with all season dropping as low as 1/3-1/4 of their dry value. Of course, snow tires plus AWD is even better, but I find snow tires on a FWD vehicle to be plenty to drive up steep hills in snowy weather. (Before learning of the wonders of snow tires, I used to have to take different r…

>Snow tires can actually double your coefficient of friction on snowy pavement! Citation? Seems to good to be true. Maybe studded tires on the perfect ice. >The coefficient of friction drops fast on snowy ground, NickCageYouDontSay.jpg

https://www.edmunds.com/car-reviews/features/tire-test-all-s...

It's likely more than double as the test results indicates lateral G not coefficient of friction. Snow tires make a bigger difference than any other factor. Good tires make a bigger difference on track too, more than any one single performance upgrade

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#296

Post by saalweachter »

vablings wrote: post #295
cucumber3732842 wrote: post #291

Earlier quoted context omitted.

>Snow tires can actually double your coefficient of friction on snowy pavement! Citation? Seems to good to be true. Maybe studded tires on the perfect ice. >The coefficient of friction drops fast on snowy ground, NickCageYouDontSay.jpg

https://www.edmunds.com/car-reviews/features/tire-test-all-s... It's likely more than double as the test results indicates lateral G not coefficient of friction. Snow tires make a bigger difference than any other factor. Good tires make a bigger difference on track too, more than any one single performance upgrade

I would note the big difference in that trial is for summer vs snow, with all-season showing smaller degradation.

So there's two things going on: first, snow tires are a softer rubber that functions better at lower temperatures. There is a zone of "warm" snowy weather where all seasons are just fine, but then you get below 20F or 15F or so, and the all season start to harden, and their performance drops off a cliff.

Second, snow tires are made to get packed with snow at low speeds, because the friction of snow on snow is higher than snow on rubber.

So damn cold weather or enough snow for the packing to kick in, and two snow tires will start beating four all season.

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#297

Post by cucumber3732842 »

vablings wrote: post #295
cucumber3732842 wrote: post #291

Earlier quoted context omitted.

>Snow tires can actually double your coefficient of friction on snowy pavement! Citation? Seems to good to be true. Maybe studded tires on the perfect ice. >The coefficient of friction drops fast on snowy ground, NickCageYouDontSay.jpg

https://www.edmunds.com/car-reviews/features/tire-test-all-s... It's likely more than double as the test results indicates lateral G not coefficient of friction. Snow tires make a bigger difference than any other factor. Good tires make a bigger difference on track too, more than any one single performance upgrade

That's vs the summer tires. Compared to the all seasons the results are much more modest and square with observed reality rather than internet hype.

From the link:

>Snow Test Results >No one expects the snow tires to come in anywhere but 1st place >on this wintry surface at AET. The point here is to see how big their advantage really is over all-season and summer tires.

>It takes 11.7 seconds for our Civic Si to accelerate to 40 mph on snow tires, and 14.5 seconds to get there on all-season rubber — nearly 3 seconds and 24 percent slower. As for the summer tires, well, they require, ahem, 41.7 seconds as they struggle to 40 mph. That's no typo; it takes a half-minute longer — 257 percent more time — for the summer tires to reach this modest speed.

>What about our traditional 0-60-mph test? Well, snow tires get to 60 mph in 19.1 seconds, while the all-season treads arrive in 22.9 seconds, nearly 4 seconds later. Forget the summer tires, however. The available 3,650 feet of snow — seven-tenths of a mile — isn't enough. We figure 67 seconds and 3,100 feet are needed to get there, and then there's the small matter of needing to stop again.

>And that brings us to our next test: full stops with ABS engaged. Here again the snow tires dominate, stopping from 40 mph in 156 feet, some 28 feet shorter than the all-season tires' 184-foot performance. Meanwhile, our summer tires skate to an ultimate distance of 351 feet, the ABS actuator rattling for all it's worth the whole way.

>Increase the starting speed to 60 mph and these distances more than double. It takes 362 feet for the snow tires to stop and 421 feet for the all-season donuts. The summer tires sit this one out because they can't manage to get themselves to 60 mph in the first place. (We do the math instead and come up with an estimate north of 800 feet.)

>Skid pad results follow the same now-predictable pattern. Our snow tires pull 0.30 lateral g, the all-seasons manage 0.28g and the summer tires produce a pitiful 0.15g despite a heroic effort by our shivering hot shoe.

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#298

Post by BobaFloutist »

alooPotato wrote: post #294
BobaFloutist wrote: post #292

Earlier quoted context omitted.

Assuming you have 2 kids, you remove the back row of seats, leaving four seats, and you can just load the four bikes up side by side in the back. Like a hatchback, but much bigger.

I don't get how that works - quick look online: https://preview.redd.it/team-minivan-who-is-with-me-v0-oxprg... That's one bike, with only 3 available seats and the front tire taken off. How would you do 4?

I mean yeah, you might need to take off some front tires https://www.reddit.com/r/bicycletouring/comments/1e4zzd1/fou...

Re: Tesla is recalling its cheaper Cybertruck because the wheels might fall off

#299

Post by alooPotato »

BobaFloutist wrote: post #298
alooPotato wrote: post #294

Earlier quoted context omitted.

I don't get how that works - quick look online: https://preview.redd.it/team-minivan-who-is-with-me-v0-oxprg... That's one bike, with only 3 available seats and the front tire taken off. How would you do 4?

I mean yeah, you might need to take off some front tires https://www.reddit.com/r/bicycletouring/comments/1e4zzd1/fou...

You’re joking right? Do you have kids?
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