Rivian R1S trim comparison
2025 Rivian R1S Ascend Tri Max vs California Dune
The R1S Ascend Tri Max and California Dune are both priced at $105,900 with no spec differences in our data.
On paper, these two are nearly identical. The choice is styling or packaging, not performance.
From the measurable data, there is no hard spec reason to prefer one over the other. Pick the Ascend Tri Max or California Dune based on styling, packaging, or whichever trim you can actually find.
Price does not break the tie here. The R1S Ascend Tri Max and California Dune start at the same MSRP, so the real decision is which equipment mix fits your daily use better.
Lock one trim, change the other side, and move through exact pair pages without resetting back to the full lineup every time.
Who notices the difference
The higher trim starts to make more sense when you want the nicer equipment factory-installed and under warranty.
When both feel the same
Both the Ascend Tri Max and California Dune share the same 1-speed direct drive transmission and identical wheelbase and body dimensions.
The upgrade math
Same MSRP. The choice is purely about which features matter to you.
Key Differences at a Glance
This is the fast read: price, power, efficiency, and the feature flips most likely to change the answer.
Every Difference, Side by Side
This is the full read behind the quick decision signals above: the complete hardware, comfort, and equipment story. 0 specification differences, 4 shared.
There are no measurable spec differences in the current source data. If these trims still matter to you, the real separation is likely styling, appearance packages, or dealer inventory.
Full Specification Comparison
Specifications reflect available data as of early 2025. Confirm details with an authorized dealer before purchasing.
| Spec | Ascend Tri Max | California Dune |
|---|---|---|
| Pricing | ||
| MSRP | $105,900 | $105,900 |
| Powertrain | ||
| Engine | electric | electric |
| Horsepower | 850 hp | 850 hp |
| Torque | 1103 lb-ft | 1103 lb-ft |
| Transmission | 1-speed direct drive | 1-speed direct drive |
| Drivetrain | AWD | AWD |
| Dimensions | ||
| Wheelbase | 121.1" | 121.1" |
| Length | 200.8" | 200.8" |
| Width | 82.0" | 82.0" |
| Height | 77.3" | 77.3" |
| Safety | ||
| IIHS Award | TSP+ | TSP+ |
| Warranty | ||
| Bumper-to-Bumper | 5yr/60k | 5yr/60k |
| Powertrain | 8yr/175k | 8yr/175k |
| Corrosion | 8yr/unlimited | 8yr/unlimited |
| Roadside Assistance | 5yr/60k | 5yr/60k |
Data sources: licensed third-party automotive data, EPA fueleconomy.gov, NHTSA, and official manufacturer materials. Values marked est. are estimated.
2025 Rivian R1S Ascend Tri Max vs California Dune Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the Rivian R1S lineup, the Rivian brand hub, the Full-Size SUVs, the how to pick a trim guide, or our mid-trim value research when you need the bigger shopping path behind this one matchup.
Do the 2025 R1S Ascend Tri Max and California Dune cost the same?
Yes. Both start at $105,900. There is no MSRP gap between them, so this choice comes down to equipment, features, and configuration differences rather than price.
Do the 2025 Rivian R1S Ascend Tri Max and California Dune have the same engine?
Yes. Both use the electric producing 850 hp and 1103 lb-ft of torque. The engine hardware does not change between these trims, so the real differences are in equipment and feature content.
Do the 2025 R1S Ascend Tri Max and California Dune have the same drivetrain?
Yes. Both come with AWD as standard. The differences between these trims are in features and equipment, not drivetrain.
What warranty does the 2025 Rivian R1S come with?
All 2025 Rivian R1S trims, including both the Ascend Tri Max and California Dune, come with Rivian's standard warranty: 5yr/60k bumper-to-bumper and 8yr/175k powertrain coverage. Warranty does not vary by trim level.
Why do the 2025 Rivian R1S Ascend Tri Max and California Dune look so similar on paper?
The separation is usually in appearance packages, upholstery, or wheel designs rather than in the measurable spec sheet.
The Full Story Behind This Price Gap
Use the direct answer above for this exact matchup, then use these guides to understand whether you are really looking at a feature step-up, a package shuffle, or the point where the lineup starts changing in a meaningful way.
What Both Trims Share
The R1S Ascend Tri Max and California Dune share the same engine, drivetrain, and transmission. There are no measurable spec differences between these trims. The differences are limited to appearance and packaging.
Trim-Matched Accessories
These add-ons are split by trim intent so the recommendations follow the actual use case, not just the same repeated product block.
Rivian R1S Ascend Tri Max
Value-trim add-onsThese picks fit the Ascend Tri Max best when the goal is covering the daily-use gaps without paying up to the next trim.
Rivian R1S California Dune
Step-up trim add-onsThese picks suit the California Dune when you want the accessories to match the nicer cabin, broader utility, or more premium use case.
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Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material for the 2025 model year. Actual pricing, features, and availability may vary by region and dealer. Always confirm details with an authorized dealer before making a purchase decision. TrimAtlas is not affiliated with Rivian or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.