Uploaded August 2024 | Updated September 2026, 3 weeks ago

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This easy addition to the onboard air system on my Rivian R1T lets me air up all four tires at the same time, to exactly the same pressure, while I sit in the air conditioned cabin and watch YouTube or something. I am in AZ and it's just no fun to babysit tires when it's 110 outside. I had some of the parts on hand from doing air things before, and from having trimmed back on my air tools and keeping the connectors. The total cost without them would be around $100 without the auto air-down parts.

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Front hose length (2 hoses): 12 feet
Rear tire hose (2): 22 inches
Split to passenger side: 8 feet
Split to driver side: 4 feet

The remaining hose will be the single hose to the onboard air outlet. The measurements aren’t highly critical, just get it close. If anything go a tiny bit short on them to be sure your 50' hose is enough.