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Head & Foot Massage
Two low-noise massage motors with three intensities and a timer for wind-down routines and recovery.
Ergomotion Rio 4.0 Adjustable Bed Base
Starting at $1,299.00
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Description
Ergomotion Rio 4.0 · Best Seller
The full-featured adjustable bed base most people actually want
Head and foot articulation, dual massage motors, USB charging, underbed lighting, and three programmable presets. The Rio 4.0 is Ergomotion’s best-selling base for a reason: every feature you use nightly, none of the fluff.
Twin XL $1,299
Queen $1,499
Split King $2,598
#1 seller
Ergomotion’s most popular adjustable base
10 million+
Ergomotion adjustable bases sold worldwide
10-year
limited manufacturer warranty
Free
shipping in the contiguous U.S.
The “Better” in Good, Better, Best
Every feature you’ll use every night
The Rio 4.0 sits in the sweet spot of the Rio lineup. It takes the head and foot articulation, Zero-G, and underbed lighting of the Rio 3.0 and adds the comfort features people ask for most: head and foot massage with three intensities and a timer, USB-A and USB-C charging on both sides, and three programmable memory presets so your favorite positions are one touch away. It pairs beautifully with a mattress built to flex, like our natural latex mattresses, sets up in minutes, and folds for courier-friendly delivery.
See the base move
Head and foot positions for reading, relaxing, and better sleep
Raise the head for reading or reflux relief, lift the feet for circulation and pressure relief, or press Zero-G to distribute your body weight evenly. One-Touch Flat brings everything back down instantly. Natural latex is an excellent match because it flexes with the base instead of fighting it.
Pair it with an organic latex mattressFeature Set
What the Rio 4.0 includes
Head & Foot Articulation
Elevate the head, foot, or both for reading, relaxing, circulation, or pressure relief.
3 Programmable Presets
Save your favorite positions to memory buttons, plus one-touch Zero-G and Flat.
USB A & C Ports
Charge devices near the bed while keeping cords tucked away and off the floor.
Underbed Lighting
Soft light under the base helps you get out of bed at night without waking the room.
Zero-G® Preset
A weightless-feel position that distributes body weight evenly and eases lower-back pressure.
13-Button Wireless Remote
Direct control of positions, massage, and lighting with dedicated one-touch buttons.
Zero Clearance Design
Works flat on a platform or inside most bed frames. No clearance needed underneath.
Foldable & Courier-Friendly
The patented foldable design ships by regular courier and fits through doorways easily.
The Rio Lineup
Good, better, best: compare the Rios
All three share head and foot articulation, Zero-G, One-Touch Flat, underbed lighting, wireless remotes, and the same 10-year warranty. Each step up adds comfort features.
| Feature | Rio 3.0 from $699 | Rio 4.0 from $1,299 | Rio 5.0 from $1,499 |
|---|---|---|---|
| Head & foot articulation | ✓ | ✓ | ✓ |
| Zero-G® + One-Touch Flat | ✓ | ✓ | ✓ |
| Underbed lighting | ✓ | ✓ | ✓ |
| Programmable presets | 1 | 3 | 3 |
| Head & foot massage | · | ✓ | ✓ |
| USB A + C charging | · | ✓ | ✓ |
| Lumbar support | · | · | ✓ |
| Auto head tilt (anti-snore) | · | · | ✓ |
| Wall-saving design | · | · | ✓ |
| Bluetooth app control | · | · | ✓ |
Pricing
Rio 4.0 sizes
Pricing matched to Ergomotion’s own store. Choose your size above to build the cart.
| Size | Price | Best for |
|---|---|---|
| Twin XL | $1,299 | Single sleepers, one side of a split king |
| Full | $1,499 | Smaller rooms, single sleepers who spread out |
| Queen | $1,499 | Most couples and guest rooms |
| Split King | $2,598 | Independent control for each partner |
| Split Cal King | $2,598 | Longer split setup, 36″ x 84″ per side |
Latex Compatible
The best adjustable bed base for a latex mattress
Natural latex is one of the best mattress materials for adjustable bases. It bends cleanly with the base, responds instantly when positions change, and does not rely on coils or glued comfort layers that can fight the motion. Pair the Rio 4.0 with a split latex mattress and each side can have its own position and firmness.
Specs
Rio 4.0 details
BrandErgomotion
ModelRio 4.0
TypeAdjustable bed base
SizesTwin XL, Full, Queen, Split King, Split Cal King
ArticulationHead and foot, independent
MassageHead and foot, 3 intensities with timer
PresetsZero-G, One-Touch Flat, 3 programmable
Remote13-button wireless
PortsUSB-A and USB-C
LightingUnderbed LED
Legs12″ adjustable (3″+3″+3″+3″)
Deck height3.9″ profile, wood deck
Weight93 lbs Twin XL · 121 lbs Queen (per base; Split King = two Twin XL bases)
Warranty10-year limited manufacturer warranty
Warranty
The 10-year Ergomotion warranty, in plain English
Every Ergomotion base carries a 10-year limited manufacturer warranty for the original purchaser. Here is exactly how it works.
| Period | What Ergomotion covers | What you pay |
|---|---|---|
| Years 1-2 Hassle-free | Repair or replacement of any defective part, including labor and transportation | Nothing |
| Years 3-5 Parts | Replacement of any part found defective by the manufacturer | Service, installation, and shipping costs |
| Years 6-10 Prorated | Mechanical base defects on a shared-cost basis | 1/5 of the replacement part’s MSRP per year past year five (year 6 = 1/5, year 10 = 4/5) |
The prorated years 6-10 apply to the mechanical base; wear items and electronics such as the cover, legs, motors, control box, remote, and power supply are covered through the earlier warranty tiers. Register your base with Ergomotion after delivery to activate coverage; we include the registration link with every order. Full terms are available from Ergomotion, and our team handles the claim process with them for you.
Questions
Rio 4.0 FAQ
What mattress works on an adjustable base?
Adjustable bases need a mattress designed to flex. Our natural latex mattresses are the ideal match: they bend cleanly, recover instantly, and their unglued layers move with the base instead of fighting it. Mattresses specifically built for adjustable beds also work. Traditional innerspring mattresses with rigid border rods should not be used on an adjustable base. If you are unsure about your current mattress, ask us before ordering.
What does zero clearance mean?
A zero-clearance base needs no open space underneath it, so it works sitting flat on a platform bed, on solid decking, or inside most bed frames and still articulates fully. That is different from a wall hugger design, which slides the bed backward as the head rises so you stay close to your nightstand; in the Rio lineup only the Rio 5.0 is a wall hugger.
What is the difference between Split King and King?
A Split King is two Twin XL bases side by side, which together are the exact size of a King (76″ x 80″). Each side moves independently, so one partner can read while the other sleeps flat. It is the configuration we recommend for couples and the one that ships fastest.
What does the massage feel like?
It is a gentle vibration-style massage with three intensities and a timer, designed for relaxation and wind-down routines rather than deep tissue work.
Do I need a special bed frame?
No. The Rio 4.0 has a zero-clearance design, so it works freestanding on its own legs, on a platform, or inside most standard bed frames. The legs adjust from 3 to 12 inches to match your setup.
How does delivery work?
The Rio 4.0 ships free by courier in the contiguous U.S. The base folds for shipping, fits through standard doorways, and sets up in about 15 minutes with no tools required.
Need Help Choosing?
Not sure between the Rio 3.0, 4.0, and 5.0?
Talk with a Sleeping Organic specialist about sizing, split king layouts, and which Rio makes sense for your sleep style and budget. If massage and USB charging matter to you, the 4.0 is the one.
Talk to a Specialist
