EVBASE Rooftop Cargo Carrier Platform: Rivian R1S / R1T Install
Assemble the labeled perimeter and crossbars (12mm + Allen), then clamp the platform onto the Rivian cargo crossbars with the long threaded hardware. Two people recommended.
Full video (7 min): R1S / R1T Roof Rack Rooftop Cargo Carrier | Install and thoughts | EVbase · John's YouTube channel
Get the parts
- Search Amazon for EVBASE Rivian R1SSearch on Amazon ↗
- Find EVBASE Rivian R1T/R1S roof rack cargo carrier on eBayBuy ↗
- EVBASE Rivian R1T/R1S roof rack cargo carrierBuy ↗
CodeEVBASE codes JOHN20 / JOHN15 — JOHN20 / JOHN15
DEALCode "JOHN15" for 15% off (per the video description)
As an Amazon Associate I earn from qualifying purchases. Some links are affiliate links.
Assemble the labeled perimeter and crossbars (12mm + Allen), then clamp the platform onto the Rivian cargo crossbars with the long threaded hardware. Two people recommended. This 7 min guide covers the Rivian R1T / R1S 2021+ with tools, parts links and the full video.
Overview
A Rivian-specific basket-style platform that bolts to the factory cargo crossbars — no drilling. John mounts it in the common crossbar position so overhang stays balanced. Fitment matches the Rivian's industrial lines; it's heavy and the long threads take time, but it's very secure.
Vehicle & fitment
- Product
- EVBASE bolt-on aluminum rooftop cargo carrier / platform (≈83 × 44.3 in, ~661 lb rating) with T-slots
- Shown on
- Rivian R1S
- Rivian R1T / R1S 2021+ (per the product listing)
- Requires Rivian cargo crossbars (not included)
Always confirm fitment for your exact year and trim with the seller before buying.
Tools & parts
Tools
- Included wrench
- 12mm hardware / Allen keys (included)
- Second person for assembly
Parts
- Roof platform rails (labeled)
- Crossbars 1–6 (labeled)
- Mounting clamps, washers, nuts
- Rivian cargo crossbars (sold separately)
Step by step
- 1
Assemble the platform on the ground▶ 1:48
Bars and perimeter pieces are labeled 1–6. Note which face points up. Install one side's bars first, then sandwich the other rail — much easier with two people.
Tip: 12mm hardware on the sides; Allen fasteners underneath.
- 2
Set the Rivian crossbar position▶ 3:22
John used the most common factory crossbar latch position so the platform doesn't overhang too far aft.
- 3
Clamp to the crossbars▶ 3:50
Each clamp wraps the Rivian crossbar with a flat plate, washer and nut. The threads are long (more security, more time). Eyeball alignment with the other side.
- 4
Check balance and torque▶ 4:22
If you shift one mount back, adjust the other so the platform stays balanced. Confirm everything is tight before highway speeds.
Get the parts
- Search Amazon for EVBASE Rivian R1SSearch on Amazon ↗
- Find EVBASE Rivian R1T/R1S roof rack cargo carrier on eBayBuy ↗
- EVBASE Rivian R1T/R1S roof rack cargo carrierBuy ↗
CodeEVBASE codes JOHN20 / JOHN15 — JOHN20 / JOHN15
DEALCode "JOHN15" for 15% off (per the video description)
As an Amazon Associate I earn from qualifying purchases. Some links are affiliate links.
FAQ
What vehicle does this install fit?
It is shown for the Rivian R1T / R1S 2021+. Requires Rivian cargo crossbars (not included) Always confirm your exact year, trim and factory audio with the seller.
How long does the install take?
John's full video is 7 min. Plan on that much time for a careful DIY install, plus extra if you are new to dash work.
What tools do I need?
Tools called out in the guide: Included wrench; 12mm hardware / Allen keys (included); Second person for assembly.
Where do I get the parts?
Use the buy links on this page for the unit and any harnesses John used. Some links are affiliate links.
Is this beginner-friendly?
The guide breaks the job into 4 steps with timestamps into the video. If you can remove trim panels carefully, you can follow along.
Full transcript
Show the full transcript (85 lines) +
0:09What's up guys, it's your boy John. We have the Rivian R1S and we just need the little roof rack
0:15It's like kind of like a basket without like the edges. We got something from EV base that way we can put our
0:22We can tie more things down. This is the product right here. Oh, okay each of what it is. And it comes in a really
0:32Kind of see it compared to the Rivian right here. It's a pretty big box
0:38Now we have hardware in one box
0:40we have
0:43Kind of like a 90 degree elbow
0:46And none 90 degree 99 degree 99 degree everything's packaged super solid
0:51The hard wear it uses
0:56Look at this. Does it really come with its own little wrench
1:04What the heck I've never seen it so
1:07It has its own little
1:12Box right here
1:14and then you have
1:16the crossbars and then
1:19then this is like
1:22The big piece right here the metal
1:24And let me just pull it down for you. So there's like these little mounting holes
1:32It's pretty self-explanatory for the install you just make a giant oval and then you put the crossbars in it
1:39There's just little holes to be self-explanatory. I'm gonna have it put together first and then I'm gonna show you guys how we
1:46Put it together
1:48Alright, so we have the EV base set up
1:50Let me go over the insulation and kind of go over it with you each of them
1:55We're gonna be labeled each
1:55bars, Bars and label 1 2 3 4 5 6 and it's gonna have its own label around the outer perimeter as well
2:03And you can kind of see this is what faces up on ours right here
2:08So it kind of goes you can see that pattern right there
2:12Dish is sweet
2:14Yeah, you just hooked up the 12 mils over here on each side you kind of put them in and on the bottom you're gonna see
2:23Some Allen keys, that's it
2:25Nothing too crazy
2:27Once you put them in
2:28The tricky part is kind of do one sides first so do this side put all the bars in
2:35Then you kind a sandwich it
2:37I would definitely say have two people help you with this or like have two people doing this
3:11You just put it like this and then you have
3:17the screw it on to it like so
3:22And that's it. You just have it on the crossbars
3:26We're gonna try it on this default position right now the Rivian R1 S has a another spot
3:32You can put the I can't see it from here, but another spot maybe you guys can see it
3:38Or you can latch on the thing, but I think this is the most
3:43Common spot people put their crossbars, so we're gonna try to go for that first and we'll port back to you how it looks
3:50Alright, so we got the little I mean kind of talked about it. This just goes over the crossbar
3:57Then you have the flat piece go against
4:01The thing right here
4:03Kind of want to lie it. It up with how we have it over there
4:07Eyeball it
4:11Washer and then nut
4:18Alright, so we have the R1 S
4:22Roof rack my EV base and man, it is sturdy
4:28It I made latches on right here these, these threads. There's so many threads
4:33It's a pain in the butt to kind of like screw them on but I know more threads equal to safer
4:38So for safety reasons
4:41It's there. It just kind of
4:43takes a while to mount and
4:46Of course you can mount them into different sections
4:49This is what kind of looks
4:51Right for us because if we move one back
4:55it would
4:57This would have too much overhang
5:00If you if that makes sense, I imagine this to be one more step back then you would have to use this
5:06So that means that we would have to move this one over here
5:10To kind of latch it on to this one and I think this is like the way you're supposed to do it
5:15Because then now if you move everything back it might there's less
5:21balance
5:23But yeah, whoo
5:25EV base
5:26looking good
5:29Let me get this the car this truck or R1 s outside you can kind of see it in the Sun
5:46Alright, so we have the R1 s with the EV bases
5:51roof rack
5:52rack thing
5:54But yeah, it's looking good. It's super solid. It's on there good
5:57You can tie it even more but it ain't going nowhere
6:01It looks beautiful in the car. It really complements the lines of the
6:05Kind of like that industrial look which I really appreciate and the fitment
6:10Everything looks proper. It doesn't look like it doesn't belong even but each of the rails like look at that
6:17The way it sits on the thing. It perfectly matches the crossbar on the Rivian and it just everything just flows
6:24Well, it's made specifically for the R1 s and not like a universal
6:29Peace
6:30But yeah, if you guys were interested in this product use my code
6:34John you'll get some you get kicked back and it helps me out
6:38but uh, yeah
6:41Not a lot of information about this product, so I wanted to show you guys something cool
6:45Thank you for watching. I'll catch you guys in the next one. Peace
Machine-transcribed from the full-length video and lightly cleaned (product names fixed). Watch the video for exact wording.
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