Gen2s Missing Onboard Air Compressors

[Nine_One_Six_R1S]

I keep the 1/2 in stubby the frunk, but I also have the 1/2 high torque available in case things get really stubborn. However, the stubby with the 2.5ah HO has been more than up to the task thus far.

Edit: I also have the 3/8 mid torque which on paper says it can do lug nuts, but I've been disappointed too often, hence the stubby.

I've seen videos on YT where the measured torque is the same in their test rig. Obviously in practice maybe you have experienced something else. But these may have the same internals and just the collet difference to hold 3/8's vs 1/2's sockets

If you wait until September, you can get the new Gen 2 M12 Stubby, which has more than twice the torque (in reverse anyways) of the current gen.

3/8” makes for more compact sockets and is sufficient for lug nut removal. I also carry a 1/2” torque wrench, since you really should torque lug nuts to spec and not torque with the impact. I have a 1/2” drive 22mm deep well socket and an impact adapter to fit the socket to my 3/8” stubby.

I was going to go with the 1/2” thinking it would be necessary for lug nuts on the road, but our heavy equipment field mechanic said he’d go with the 3/8”—that it’s plenty for general truck wheel swapping needs (or really anything on these vehicles). We have 1/2” mid and high torque M18 impacts in our shop and on his service truck. They are definitely overkill for anything normal on our vehicles (probably unlikely that you have any rusted or seized fasteners on something so new).

Ohhh, that sounds like a plan then. Since I am in no hurry I can wait for 2x more torque.

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[SurfnBike]

Exactly! An off-road vehicle needs a more robust inflator than ANY of the run-of-the mill tire inflators, especially if you have big tires like the 35" AT tires my Cybertruck came with on 20" rims. I use this one with the Quad tire Morrflate hose system and it fills all four tires simultaneously, from 30-50 psi in 4 minutes flat! It's pretty impressive:

Amazon.com: TC·BL Portable Air Compressor 110V,Ultra Quiet Air Compressor Oil Free and Lightweight Small Air Pump : Tools & Home Improvement

Here it is in action:

Very cool. Will the onboard inverter in the R1S be able to handle that compressor? Amazon lists the draw at 900W, but not the start-up draw.

 

[RivianRunner]

Very cool. Will the onboard inverter in the R1S be able to handle that compressor? Amazon lists the draw at 900W, but not the start-up draw.

I'm pretty sure the R1S can handle it as it seems like it has soft start. The Cybertruck doesn't have any problem with it and when it was pumping, I glanced at the center display of the truck and think it said it was only drawing 0.5 kW.

It sounds very quiet and smooth, like it's not even struggling. I'm really impressed with the motor and motor controller, not so much with the pressure sensors and setting the pressure cutoff (because it's in 5 psi increments and the sensors don't seem too accurate). It's more of a compressor for a finish nailer and less of a built-for-purpose tire inflator. I say that because it's not "set and forget", I have to set the cutoff pressure very high and just monitor the pressure and turn it off when I've reached my target. That's because if I turn it off it's above the cut-on pressure (the differential between the cut-on and cutoff pressures isn't adjustable) I need to up the cut-off pressure to get it to start again. The cut-on pressure rises as you increase the cut-off pressure. So I just set it to 85 psi or so and then turn it on and turn it off when it's where I want it to be. If the pressure isn't correct once I turn it off, it's a simple matter to turn it on for a few more seconds.

I'm impressed with it so far, it's surprisingly quick for such a compact unit. I wouldn't get this fast of an inflator unless you plan to fill all tires simultaneously (although it does have a 50% speed mode which would be handy for filling only one tire).

 

[SurfnBike]

Ok lots of good ideas in this thread, here is another thought deep from within the cobwebs of my brain...

I already have a 12V VAIR compressor (with alligator clips that you connect directly to a traditional 12V car battery). Could I buy a simple 12V socket -> alligator clips adapter and plug the 12V end into the back of the R1S?

Here's what I am thinking:
12V adapter(amazon link)
My VAIR compressor (amazon link)

 

[chrismc]

Ok lots of good ideas in this thread, here is another thought deep from within the cobwebs of my brain...

I already have a 12V VAIR compressor (with alligator clips that you connect directly to a traditional 12V car battery). Could I buy a simple 12V socket -> alligator clips adapter and plug the 12V end into the back of the R1S?

Here's what I am thinking:
12V adapter(amazon link)
My VAIR compressor (amazon link)

The Rivian 12V receptacle circuit has a 10A fuse rating for a max output of 120W (this isn’t very much). Your compressor has an amp draw of 20A.

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