What is the weight limit on the Osaki Platinum Solis Duo 4D+?

The published maximum user weight is 330 lbs. That figure is a structural limit for the frame and airbags, not a comfort rating — shoulder and hip width matter just as much for fit.

How much space does the Osaki Platinum Solis Duo 4D+ need behind it?

Osaki publishes a 10" wall clearance requirement. Measure from the finished wall — baseboards and outlet covers count against that gap.

What are the dimensions of the Osaki Platinum Solis Duo 4D+?

Upright, the published footprint is 63.0" L x 30.0" W x 48.4" H; fully reclined it measures 81.0" L x 30.0" W x 37.4" H. Check doorways and stair turns before delivery — the chair weighs 286 lbs.

Is the Osaki Platinum Solis Duo 4D+ a 4D chair?

Yes. Osaki lists a 4D mechanism on an SL-track, which means roller speed and depth are adjustable independently rather than fixed.

Where does the Osaki Platinum Solis Duo 4D+ apply heat?

Osaki publishes heat at: lumbar. Other areas are not listed as heated in the sources we cite.

What warranty comes with the Osaki Platinum Solis Duo 4D+?

Osaki publishes: 5-year limited (3 years full service plus 2 additional years parts). Warranty terms often differ between the manufacturer and individual retailers, so confirm the coverage on the invoice you actually sign.

How much does the Osaki Platinum Solis Duo 4D+ cost?

We recorded $11,999 at Osaki USA (direct) on 2026-09-27, where it was shown as sold out. Prices change often; confirm the current price and stock with the seller.

Has ChairMentor tested the Osaki Platinum Solis Duo 4D+?

This is a Research Review. Every specification on this page is cited to Osaki's own documentation and dated, but we have not sat in this chair, so we do not rate comfort, noise or long-term reliability.

Osaki

Osaki Platinum Solis Duo 4D+ Review

Name: Osaki Platinum Solis Duo 4D+
Brand: Osaki

Research ReviewCore specs verified · 15/23 fields

By ChairMentor Editorial Team · Research and editorial standards

Last reviewed 2026-09-27

Specifications are sourced from manufacturer documentation and retailer listings, each with a citation and verification date. How we research.

Photo: Osaki USA official product page

9.1/10 spec score

Price: $11,999 (sold out at Osaki USA (direct) when checked 2026-09-27)
Best for: The highest user weight limit in the Osaki line
Roller / track: 4D · SL track

Pros

330 lb user weight limit, the highest of any chair in our database
Dual 4D mechanism on an SL flex track that reclines past flat
Reclines to 81 inches, so the leg rest clears taller users

Cons

Needs 10 inches of wall clearance behind the backrest to recline fully
286 lb chair weight makes repositioning a two-person job
A premium list price, second only to the Ai Vivo among the Osaki chairs we cover
Sold out at Osaki USA direct when checked on September 27, 2026; other sellers were not checked

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Our Take

Our editorial assessment of this chair, based on verified specifications rather than hands-on testing. This is a Research Review.

The Platinum Solis Duo 4D+ is the top of the Osaki range we cover and the only one built around a dual 4D mechanism on an SL Flex Track, with spinning calf rollers and the longest published reclined length in the set at 81 inches.

Its defining specification is not the mechanism, though — it is the 330 lb published user weight limit, 55 to 70 lb higher than every other Osaki here. For a shopper who is above the 260-275 lb limits of the rest of the line, this is not a luxury upgrade; it is the only chair on this list that is rated for them.

The compromises are space and price. Osaki publishes ten inches of required wall clearance and an 81-inch reclined length, so this is a chair that needs a planned position in the room. Our editorial assessment: if you fit comfortably inside the Maestro's or Vera's limits and do not specifically want the dual mechanism, the premium over those chairs is hard to justify on published specifications alone. If you do not fit them, it is the obvious choice — but note it was sold out at Osaki USA direct when we checked on September 27, 2026.

Where it fits in the Osaki lineup

The Solis Duo sits at the top of the published Osaki line-up. Nothing we cover sits above it, which means the buying question is not whether to step up but whether the step up from the Maestro or Vera is warranted by your body size and your appetite for the dual-mechanism design.

Same recorded price or less

Osaki OS-Pro Maestro 4DAbout $3,000 less than the Platinum Solis Duo 4D+The conventional OS-Pro flagship: single 4D mechanism on an SL track, 260 lb limit.
Osaki OS-Ai Vera 4D+About $4,000 less than the Platinum Solis Duo 4D+Compact 4D with a 275 lb limit and 9.25 inches of wall clearance, for less money.

What you’re really paying for

Relative to the Maestro and Vera, the Solis premium concentrates in three published specifications and a handful of secondary ones.

330 lb published user weight limitThe single most consequential line on this spec sheet. No other Osaki we cover publishes above 275 lb. For buyers it applies to, this alone justifies the price.
Dual 4D mechanism on an SL Flex TrackTwo mechanisms allow simultaneous work on different regions and a track that flexes rather than following a fixed path. Genuinely different in design; how much difference a given user perceives is not something we can state without testing.
Spinning calf rollers and 54 air cellsOsaki's page lists both; lower-body work is more elaborate than on the Maestro or Vera, which list calf heat rather than calf rollers. Worth something if the legs are where your discomfort is; not a reason to move up otherwise.
81-inch reclined lengthA consequence of the frame rather than a benefit. Combined with ten inches of published wall clearance, it is a cost of this chair, not a feature.
Program and feature countOverrated at this priceAbove a certain point, additional preset programs stop changing how a chair is used day to day. We would not pay a premium for program count alone.

Who it suits, who should skip it

Osaki's flagship dual-mechanism chair and the one to look at if weight capacity is the deciding factor. Research Review built from Osaki's official specification table.

Best for: The highest user weight limit in the Osaki line. Skip it if you fall outside the stated fit (Not verified in sources checked, up to 330 lb), cannot give it 10" of wall clearance, or would rather spend less — our budget guides cover cheaper verified chairs.

Buying trade-offs from the published specs

We have not verified a model-specific user height range for the Platinum Solis Duo 4D+ in the sources checked. Track length is not a fit rating, so confirm roller reach at the shoulders in person or with the seller before buying.
It needs 10 in. behind the backrest to recline fully — plan the room around the reclined footprint, not the upright one.
Its 330 lb stated limit is the highest among the chairs we currently publish.
8 other 4D chairs we publish have a lower recorded price, so the premium has to be justified by fit, warranty or features.
Warranty as published: 5-year limited (3 years full service plus 2 additional years parts). Compare labor, parts and structure tiers separately.

Massage system

Rollers and track: 4D rollers on a SL track. More roller axes add depth and rhythm control; track shape decides how far down the body the rollers travel.

Air, feet and calves: 54 airbags; foot rollers not verified, calf rollers yes. Airbag counts are not comparable across brands without placement data.

Heat, recline and programs: heat at lumbar; an unverified number of zero-gravity position(s); stretch programs yes; body scanning not verified.

We have not measured pressure, noise or heat output on this chair; these figures are the manufacturer's.

Controls and app

Voice control: Yes. Bluetooth: Yes. Manufacturer app: Not verified.

Fit and space

Stated user height: Not verified in sources checked. Maximum user weight: 330 lb.

Upright: 63.0" L x 30.0" W x 48.4" H. Reclined: 81.0" L x 30.0" W x 37.4" H. Required wall clearance: 10".

We do not describe seat feel or cushioning without a hands-on record.

Warranty, delivery and price

5-year limited (3 years full service plus 2 additional years parts). Coverage tiers commonly differ between parts, labor and structure, and can vary by retailer.

White glove delivery: Yes. Chair weight: 286 lb — measure doorways and stairs before delivery day.

Recorded price: $11,999 (sold out at Osaki USA (direct) when checked 2026-09-27) (last checked 2026-09-27). Prices change often; confirm the current price and stock at the seller.

Alternatives

Comparable chairs from our database are linked below.

Osaki OS-Pro Maestro 4DAbout $3,000 less than the Platinum Solis Duo 4D+Choose it instead: You are inside the 260 lb limit and want a long conventional SL track without the Solis premium or its ten inches of wall clearance.Stay with the Platinum Solis Duo 4D+: You need the 330 lb rating, or you specifically want the dual mechanism and Flex Track design.Compare head-to-head
Osaki OS-Ai Vera 4D+About $4,000 less than the Platinum Solis Duo 4D+Choose it instead: Space is the constraint. The Vera is 12.5 inches shorter reclined, needs 9.25 rather than 10 inches of wall clearance, and publishes a 275 lb limit.Stay with the Platinum Solis Duo 4D+: The 275 lb limit is too close for comfort, or you want the spinning calf rollers, voice recognition and Bluetooth speakers Osaki lists for the Solis.Compare head-to-head
Osaki OS-Highpointe 4DAbout $7,000 less than the Platinum Solis Duo 4D+Choose it instead: You want 4D rollers at the lowest price in Osaki's 4D range and can work inside a 270 lb limit.Stay with the Platinum Solis Duo 4D+: You need the weight capacity or the dual mechanism; neither is available further down the line.Compare head-to-head

Final verdict

Osaki's flagship dual-mechanism chair and the one to look at if weight capacity is the deciding factor. Research Review built from Osaki's official specification table.

Scorecard

Scores are calculated from the verified specifications below, using the same formula for every chair on the site. They rate the hardware on paper, not how the chair feels — see the scoring rules.

9.1

out of 10 · spec score

Exceptional on paper. Weighted average of 6 scored categories, each computed from cited fields.

Massage hardware 30% of overall: 9.8
Body fit 20% of overall: 10.0
Feature set 15% of overall: 8.7
Controls and automation 10% of overall: 10.0
Warranty 15% of overall: 9.0
Value for money 10% of overall: 5.1

Not scored

Comfort and upholstery: How a chair feels over a 30-minute program cannot be read off a spec sheet. We score this only for chairs we have sat in.
Reliability and service: Requires long-term ownership data we do not yet have. Warranty terms are scored separately; actual service quality is not.

Full specifications

Specifications are stored once in our product database and rendered here, on comparisons, and in buying guides.

Specifications for Osaki Platinum Solis Duo 4D+
Brand	Osaki
Model	Platinum Solis Duo 4D+
MSRP	$11,999
Recorded price (lowest named seller)	$11,999
Roller type	4D
Massage track	SL track
Track length	Not verified
Airbags	54
Zero gravity positions	Not verified
Heat locations	Lumbar
Foot rollers	Not verified
Calf rollers	Yes
Body scanning	Not verified
Stretch programs	Yes
Voice control	Yes
Bluetooth	Yes
App	Not verified
Dimensions (upright)	63.0" L x 30.0" W x 48.4" H
Dimensions (reclined)	81.0" L x 30.0" W x 37.4" H
Required wall clearance	10"
Chair weight	286 lbs
Maximum user weight	330 lbs
Recommended user height	Not verified in sources checked
Warranty	5-year limited (3 years full service plus 2 additional years parts)
White glove delivery	Yes
Country of manufacture	Not verified
Price last checked	2026-09-27
Specifications last verified	2026-09-01

Where these specifications come from

Each figure below was read off the page listed and dated when we checked it. Manufacturers revise specifications without notice — if a number here disagrees with the retailer at checkout, the retailer’s page governs.

[1] Osaki USA official product page — 4D dual mechanism — checked 2026-09-27
Roller system, Track type, Airbag count, Calf rollers, Heat locations, Stretch programs, Max user weight (lbs), Voice control, Bluetooth audio, Dimensions upright, Dimensions reclined, Wall clearance (in), Chair weight (lbs), Warranty, White glove delivery

Frequently asked questions about the Osaki Platinum Solis Duo 4D+

Answers are generated from the same cited specifications shown above. Where a figure is not published by the manufacturer, we leave the question out rather than guess.

What is the weight limit on the Osaki Platinum Solis Duo 4D+?: The published maximum user weight is 330 lbs. That figure is a structural limit for the frame and airbags, not a comfort rating — shoulder and hip width matter just as much for fit.
How much space does the Osaki Platinum Solis Duo 4D+ need behind it?: Osaki publishes a 10" wall clearance requirement. Measure from the finished wall — baseboards and outlet covers count against that gap.
What are the dimensions of the Osaki Platinum Solis Duo 4D+?: Upright, the published footprint is 63.0" L x 30.0" W x 48.4" H; fully reclined it measures 81.0" L x 30.0" W x 37.4" H. Check doorways and stair turns before delivery — the chair weighs 286 lbs.
Is the Osaki Platinum Solis Duo 4D+ a 4D chair?: Yes. Osaki lists a 4D mechanism on an SL-track, which means roller speed and depth are adjustable independently rather than fixed.
Where does the Osaki Platinum Solis Duo 4D+ apply heat?: Osaki publishes heat at: lumbar. Other areas are not listed as heated in the sources we cite.
What warranty comes with the Osaki Platinum Solis Duo 4D+?: Osaki publishes: 5-year limited (3 years full service plus 2 additional years parts). Warranty terms often differ between the manufacturer and individual retailers, so confirm the coverage on the invoice you actually sign.
How much does the Osaki Platinum Solis Duo 4D+ cost?: We recorded $11,999 at Osaki USA (direct) on 2026-09-27, where it was shown as sold out. Prices change often; confirm the current price and stock with the seller.
Has ChairMentor tested the Osaki Platinum Solis Duo 4D+?: This is a Research Review. Every specification on this page is cited to Osaki's own documentation and dated, but we have not sat in this chair, so we do not rate comfort, noise or long-term reliability.

Owner reviews

Submitted by readers who own this chair. Every post is moderated before it appears, and owner ratings are kept entirely separate from our specification score — they never change a score, a ranking or a best-of pick.

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