How This Rivian R1T Went Over 500 Miles At Highway Speeds

A group of engineers hacked together the ultra-long-range EV pickup everybody wants.

Rivian R1T Cannonball attempt

Photo by: Aging Wheels (YouTube)

Tim Levin

By: Tim Levin

Dec 29, 2025 at 3:00pm ET

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The Tesla Cybertruck never got the range-extending battery option the carmaker advertised way back when. But thanks to the ingenuity of a crack team of electric-vehicle nerds, at least one Rivian R1T now sports such an upgrade.

The project is a fascinating bit of home-brewed EV hackery and also says a lot about the challenges of designing EV trucks. You can check out how it all came together in the video below.

This heavily modified 2022 R1T now boasts 310 kilowatt-hours of energy storage, good for a theoretical range of 620 miles (assuming a reasonable 2 miles per kWh). Or slightly less on the highway, as the group learned when they took it out on the open road.

The nagging problem here, of course, is that the bed is unusable, seeing as it's packed to the gills with extra Rivian battery modules. So this R1T can barely be called a pickup anymore, as the only thing it's carrying are kilowatt-hours. But the sacrifice happened in service of a larger goal: beating the Cannonball Run record (a cross-country route from Manhattan to Los Angeles) for an electric vehicle.

The YouTube channel Aging Wheels documented the experiment and record attempt, releasing part two of the adventure on Sunday. In the first video, the crew—helmed by a guy named Ryan—tried and failed to beat the record due to some issues with the truck. This time, they diagnose the issues, make some modifications to the R1T and set out again.

I found the whole video series interesting for a couple of reasons. First off, it's amazing watching these guys engineer a range-extending system from scratch. They source two extra Rivian packs from crash-tested vehicles, then manage to make a 180-kWh "Mega Pack" that can charge at nearly 300 kW—faster than the Rivian itself at some charging stops.

They MacGyver'd a whole cooling system using an ice chest that needs to be refilled at every charging stop. And it actually all works pretty well, feeding energy to the R1T's pack and boosting range dramatically.

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It's also a fascinating illustration of what it would take to create an ultra-long-range electric pickup truck. The simple fact of EV trucks is that they're big, heavy and generally have the aerodynamics of a brick.

That's dogged the consumer appetite for vehicles like the Chevrolet Silverado EV and the now-canceled Ford F-150 Lightning. The reality is they need huge batteries to deliver a satisfying range of 300-plus or 400-plus miles of EPA range, and that hikes up costs to far more than a gas truck.

To make an EV with over 500 or 600 miles of range, you need to either focus on efficiency—that means a small, aerodynamic and lightweight vehicle like a Lucid Air—or you need a ton of batteries. Trucks generally require the latter approach. And this group's R1T shows how hard it would be to make a midsize-ish truck with the kind of range some EV skeptics say they'd need. Where exactly would all the batteries go?

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Rivian sells a Max-Pack truck with an EPA-estimated 420 miles of range—or somewhere in the 300s during real-world highway driving. That should be plenty for most people, but it's interesting to consider what it would take to make a similar truck with way more range than that. Right now, it looks like that would require strides in battery energy density.

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In the end, the truck is a mixed success. With a topped-up truck and auxiliary battery, the team manages to cover a stunning 510 miles at an average speed of 68 mph. As for whether they beat the Cannonball Run record, I'll let you watch the video and find out.

Contact the author: Tim.Levin@InsideEVs.com

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