4 ms·

> It won’t void your warranty. Wow, that is truly surprising. I’d be more worried about the driver if I were Rivian? What stops someone from driving through a

> It won’t void your warranty. Wow, that is truly surprising. I’d be more worried about the driver if I were Rivian? What stops someone from driving through a creek and submerging their truck? Damaging their undercarriage on a rock? Sliding into a tree? etc. > The Rivian was designed, and is, an incredibly competent off road vehicle. It looks like it doesn’t have locking differentials but that’s usually overkill. > It literally has an Off-Road drive mode with 4 different setups within it I’ll need to read more about the “Off Road” drive modes. It sounds similar to the Tacoma’s “Crawl Control”. > a built in air compressor in the truck need for adjusting your tire pressure when you take it off road. An air compressor is nice but you can pick up a Tsunami Air Compressor and a tire deflator for like $130.

wkipling 3y ago
Off-road cars have limitations. I'll bet the Rivian just like other 4wds will have a maximum wading depth for water crossings.
- defrost 3y ago
  If the door seals are good there's not a maximum wading depth, rather a maximum time paddle boating in water before seals give way | river current moves the 4x4 too far. See: https://www.youtube.com/watch?v=LC5ld79joIA https://www.youtube.com/watch?v=LC5ld79joIA Note that the Land Cruiser is bouyant in the water and not touching ground.
  - arjvik 3y ago
    How did the driver turn??
    - defrost 3y ago
      Back wheels spinning in water create weak driving force forward. Front wheels can turn and provide rudimentary front rudder effect wrt force from rear wheels pushing forward. If 4xwheel drive was engaged the front wheels wouls also be driven and provide a "clawing forwards" directional force. It's not the ideal boat, but it floats and works up to a point (as seen). With the engine weight forward it's entirely possible the front wheels were occassionally touching down when over the pan of the crossing. When the vehichle went to the left of the crossing it's unlikely the front wheels had any contact as the crossing (unflooded) is typically higher than the river bed on either side.
    - 83 3y ago
      Looks to me like mostly momentum and current carried him to a spot where his front tires touched bottom at which point he was able to spin around. He was pretty adrift until he hit that spot.
- threeio 3y ago
  https://www.youtube.com/watch?v=T21njN2HJgY https://www.youtube.com/watch?v=T21njN2HJgY
NickNameNick 3y ago
It doesn't have differentials at all ... Each wheel has it's own motor.
- almost_usual 3y ago
  I see so slips are impossible to prevent, this seems like a big limitation for serious off roading. https://www.rivianforums.com/forum/threads/quad-motor-vs-locking-diff.12010/ https://www.rivianforums.com/forum/threads/quad-motor-vs-loc... The Tacoma Off Road Crawl Control is somewhat similar but uses ABS to prevent slips. It does come with a rear locker though.
  - abenga 3y ago
    I'm not an expert here, but what stops four wheels from all rotating at the same speed with independent motors?
    - almost_usual 3y ago
      From the link: > If the axles are not physically tied, there is no way for any of the four wheels to know how much traction it actually has until it breaks free. Then, of course, it knows "too much" torque and it can apply traction control. But the damage is done. It has broken free, and any negative consequences have already happened prior to the computer being able to make any further calculations. > Again, if physically locked together with large gears and drive shafts, there is no possible way for one wheel to break free in that manner, unless of course something is broken.
    - bluGill 3y ago
      All four wheels rotating at the same speed is the normal case: straight line driving on good pavement. The real question is can all the wheels go to zero traction at the same moment and thus the computer thinks all is well. I think the odds of that are low enough to not worry about.
      - callalex 3y ago
bluGill 3y ago
It isn't surprising that off road is covered in warranty. They may put limits in, but look at truck ads: most of them are showing people towing a heavy load, hauling big things, or driving off road - often more than one of the above. Sure that isn't how people actually use them (most of the time), but that is how they sell them. I haven't looked at Rivian's ads, but if they show their trucks doing something in an ad, then a lawyer will have no problem convincing the courts that because it was in the ads the warranty fine print was a misprint and that is acceptable use.

wkipling 3y ago

Off-road cars have limitations. I'll bet the Rivian just like other 4wds will have a maximum wading depth for water crossings.

defrost 3y ago
If the door seals are good there's not a maximum wading depth, rather a maximum time paddle boating in water before seals give way | river current moves the 4x4 too far. See: https://www.youtube.com/watch?v=LC5ld79joIA https://www.youtube.com/watch?v=LC5ld79joIA Note that the Land Cruiser is bouyant in the water and not touching ground.
- arjvik 3y ago
  How did the driver turn??
  - defrost 3y ago
    Back wheels spinning in water create weak driving force forward. Front wheels can turn and provide rudimentary front rudder effect wrt force from rear wheels pushing forward. If 4xwheel drive was engaged the front wheels wouls also be driven and provide a "clawing forwards" directional force. It's not the ideal boat, but it floats and works up to a point (as seen). With the engine weight forward it's entirely possible the front wheels were occassionally touching down when over the pan of the crossing. When the vehichle went to the left of the crossing it's unlikely the front wheels had any contact as the crossing (unflooded) is typically higher than the river bed on either side.
  - 83 3y ago
    Looks to me like mostly momentum and current carried him to a spot where his front tires touched bottom at which point he was able to spin around. He was pretty adrift until he hit that spot.
threeio 3y ago
https://www.youtube.com/watch?v=T21njN2HJgY https://www.youtube.com/watch?v=T21njN2HJgY

NickNameNick 3y ago

It doesn't have differentials at all ... Each wheel has it's own motor.

almost_usual 3y ago
I see so slips are impossible to prevent, this seems like a big limitation for serious off roading. https://www.rivianforums.com/forum/threads/quad-motor-vs-locking-diff.12010/ https://www.rivianforums.com/forum/threads/quad-motor-vs-loc... The Tacoma Off Road Crawl Control is somewhat similar but uses ABS to prevent slips. It does come with a rear locker though.
- abenga 3y ago
  I'm not an expert here, but what stops four wheels from all rotating at the same speed with independent motors?
  - almost_usual 3y ago
    From the link: > If the axles are not physically tied, there is no way for any of the four wheels to know how much traction it actually has until it breaks free. Then, of course, it knows "too much" torque and it can apply traction control. But the damage is done. It has broken free, and any negative consequences have already happened prior to the computer being able to make any further calculations. > Again, if physically locked together with large gears and drive shafts, there is no possible way for one wheel to break free in that manner, unless of course something is broken.
  - bluGill 3y ago
    All four wheels rotating at the same speed is the normal case: straight line driving on good pavement. The real question is can all the wheels go to zero traction at the same moment and thus the computer thinks all is well. I think the odds of that are low enough to not worry about.
    - callalex 3y ago

bluGill 3y ago

It isn't surprising that off road is covered in warranty. They may put limits in, but look at truck ads: most of them are showing people towing a heavy load, hauling big things, or driving off road - often more than one of the above. Sure that isn't how people actually use them (most of the time), but that is how they sell them. I haven't looked at Rivian's ads, but if they show their trucks doing something in an ad, then a lawyer will have no problem convincing the courts that because it was in the ads the warranty fine print was a misprint and that is acceptable use.