Rivian TM-B: What We Know About the Smaller, Cheaper SUV

The Rivian TM-B: A New Chapter for the Brand

If you have been following Rivian's roadmap, you already know the R1T and R1S have established the brand as a serious player in the premium electric adventure space. But those vehicles start well above $70,000, putting them out of reach for many buyers. Enter the Rivian TM-B — a smaller, more affordable electric SUV built on Rivian's next-generation platform that promises to bring the brand's signature capability and design to a much wider audience.

As of early 2026, the Rivian TM-B remains an announced and upcoming model. Rivian has confirmed its development and shared preliminary details, but final specifications, pricing, and an exact on-sale date have not been locked in. What follows is a comprehensive breakdown of everything we know — and where we are making educated projections based on Rivian's engineering trajectory, supply-chain signals, and competitive positioning.

Projected Range, Battery, and Efficiency

Rivian's second-generation platform is designed around a more energy-dense and cost-effective battery architecture. While the company has not published a final kWh figure for the TM-B, industry reporting and Rivian's own commentary point toward a usable battery capacity in the 75–85 kWh range, likely using a mix of NMC (nickel manganese cobalt) chemistry for higher-energy trims and potentially LFP (lithium iron phosphate) for a base variant aimed at maximizing affordability and cycle life.

For context, LFP batteries are heavier and slightly less energy-dense than NMC, but they tolerate daily 100% charging better, degrade more slowly over thousands of cycles, and cost less to produce. If Rivian offers an LFP option on the TM-B, it would signal a strategic move to compete on total cost of ownership, not just sticker price.

Real-World Range Expectations

Rivian's target for the TM-B is an EPA range north of 300 miles, which would place it squarely in competition with the Tesla Model Y, Hyundai Ioniq 5, and Ford Mustang Mach-E extended-range variants. But EPA numbers are just a starting point.

Based on our testing of the current R1S and R1T — which typically deliver 85–90% of their EPA range in mixed real-world driving and drop to roughly 70–75% in sustained cold-weather highway use — we project the following for a 320-mile EPA TM-B:

• Mild-weather mixed driving: ~275–290 miles
• Highway-only at 75 mph: ~255–270 miles
• Cold-weather (below 30°F) highway: ~220–240 miles

Rivian's thermal management system on the Gen 2 platform is expected to include a heat pump, which should help mitigate winter range loss compared to the first-generation R1 vehicles. Preconditioning the battery before DC fast charging will also be critical for achieving peak charge speeds in cold conditions.

Charging Speed: DC Fast and Home Level 2

One of the biggest questions around the TM-B is how fast it will charge. Rivian's Gen 1 vehicles peaked at around 200 kW on DC fast chargers, which was respectable but trailed competitors like the Hyundai Ioniq 5 (peak ~240 kW on 800V architecture) and the Porsche Macan EV.

For the Gen 2 platform, Rivian has signaled meaningful charging improvements. We project the TM-B will support peak DC fast charging in the 200–250 kW range, with a 10–80% charge time of approximately 22–28 minutes depending on battery size and ambient conditions.

Understanding the Charge Curve

Peak kW numbers can be misleading. A vehicle that peaks at 250 kW will not sustain that rate for the entire session. Like most modern EVs, the TM-B's charge rate will taper significantly above 80% state of charge (SoC) to protect battery health. In practice, you will see the fastest charging between roughly 15% and 60% SoC, with a noticeable slowdown past 80%. For road trips, the most time-efficient strategy is to charge in short bursts from 10–80% rather than waiting for a full charge.

Home Charging Setup

For daily use, a home Level 2 charger is the most practical solution. At 11.5 kW (48 amps on a 60-amp circuit), the TM-B should add roughly 35 miles of range per hour of charging — enough to fully replenish the battery overnight. Expect to spend $500–$2,000 on a quality Level 2 home charger and professional installation, depending on whether your electrical panel needs an upgrade. Rivian's Wall Charger or a universal option like the ChargePoint Home Flex are both solid choices. Consult a licensed electrician for a site-specific assessment.

Performance, Drivetrain, and Capability

Rivian built its reputation on dual-motor and quad-motor performance, and the TM-B is expected to carry that DNA into a more compact package. The likely dual-motor AWD configuration should produce in the neighborhood of 400–500 horsepower, with a 0–60 mph time between 4.0 and 5.0 seconds — quick enough to satisfy most drivers without venturing into the diminishing-returns territory of 600+ hp performance SUVs.

There has been persistent speculation about a single-motor rear-wheel-drive (RWD) variant aimed at maximizing range and minimizing cost. If Rivian offers this, expect it to serve as the entry-level trim with a slightly lower MSRP and potentially the longest EPA range in the lineup.

Towing and Off-Road

Rivian's adventure positioning means the TM-B will almost certainly offer meaningful towing capability. We estimate 4,000–5,000 pounds of maximum towing capacity — less than the R1T's 11,000-pound rating, but competitive with compact and midsize electric SUVs. Keep in mind that towing any trailer will cut your effective range by 30–50%, depending on weight, aerodynamics, and speed.

Off-road, expect Rivian to offer selectable drive modes, adjustable ride height (if air suspension carries over), and the kind of ground clearance that has become a brand hallmark. The TM-B's smaller footprint could actually make it more nimble on tight trails than the larger R1 vehicles.

Interior, Cargo, and Technology

The TM-B will be smaller than the three-row R1S, likely slotting into the compact-to-midsize crossover segment with two rows of seating for five passengers. Rivian's design language emphasizes clean lines, sustainable materials, and a large central touchscreen, and we expect the TM-B to follow suit with a more cost-optimized interior that still feels premium.

Projected Cargo and Passenger Space

• Rear-seat legroom: ~38–40 inches (estimated)
• Cargo behind rear seats: ~28–32 cu ft (estimated)
• Cargo with rear seats folded: ~65–72 cu ft (estimated)
• Front trunk (frunk): Likely ~8–10 cu ft

For comparison, the Tesla Model Y offers about 30 cu ft behind the second row and 76 cu ft with seats folded. The TM-B will need to be in this ballpark to be competitive for family duty.

Driver Assistance and Infotainment

Rivian's current driver-assistance suite is a Level 2 system per SAE automation definitions — meaning it provides steering, acceleration, and braking support on highways, but the driver must remain fully engaged and attentive at all times. It is not a self-driving system. Expect the TM-B to ship with an evolved version of this ADAS stack, potentially with enhanced highway assist and improved parking automation.

The infotainment system will likely run Rivian's proprietary software on a large central display (15+ inches), with over-the-air updates, integrated navigation with route-based battery preconditioning, and connectivity features like a built-in Wi-Fi hotspot.

Pricing, Trims, and Federal Tax Credit Eligibility

Rivian has publicly stated that the TM-B is being engineered to reach a starting price around $45,000, though final MSRP by trim has not been confirmed. A realistic trim and pricing structure might look like this:

*Federal tax credit eligibility under IRS §30D is subject to multiple requirements that change frequently:

• MSRP cap: SUVs must be at or below $80,000 — the TM-B should clear this easily
• Buyer income cap: Adjusted gross income must not exceed $150,000 (single), $225,000 (head of household), or $300,000 (joint filers)
• Battery sourcing: Critical minerals and battery components must meet escalating domestic-sourcing thresholds that tighten each year — Rivian's North American manufacturing gives it an advantage, but final eligibility depends on the supply chain at time of delivery
• Point-of-sale transfer: As of 2024+, buyers can transfer the credit to the dealer at purchase for an upfront price reduction, rather than waiting to claim it on their tax return

Because these rules are complex and subject to change, we strongly recommend consulting a tax professional and checking the latest IRS guidance before making a purchase decision based on credit eligibility.

Warranty Coverage

Rivian's current vehicles come with a 5-year/60,000-mile limited vehicle warranty and an 8-year/175,000-mile battery and drive-unit warranty. For the TM-B, we expect Rivian to offer similar coverage, though the battery warranty threshold may be adjusted. The industry standard for EV battery warranties is 8 years/100,000 miles with a capacity retention guarantee of at least 70%. Rivian's 175,000-mile battery warranty on the R1 vehicles is among the most generous in the segment, and maintaining that on the TM-B would be a significant competitive advantage.

Who the Rivian TM-B Is For — And Who Should Look Elsewhere

Pros and Cons

Frequently Asked Questions