Dreame X40 Ultra
The mop pads come off entirely rather than just lifting, which is the only version of mop lifting that guarantees a dry carpet.
Best for
Removable mop pads
#ad how we are funded · price as of October 17, 2026
Disclosure — some links on this page go to Amazon, and we earn a commission if you buy through them. It costs you nothing extra and it does not change what we recommend or in what order. The full disclosure.
Dreame publishes 7 of the 7 specifications we track for this model, which is more than most. Everything below is quoted from Dreame’s own material, with the page it came from linked on each row. We have not handled this machine.
The X40 Ultra's real feature is that the mop pads come off entirely at the dock rather than merely lifting. Every published lift height in this comparison sits between 10mm and 17mm, and none of them clears a deep pile — a pad that is not on the robot at all is the only version of mop lifting that is unconditional.
The counterweight is the climb. Dreame's own model comparison puts this generation's obstacle clearing at 22mm, which is mid-pack and well below both the L40s and the X50. It is a machine for a carpet-heavy home with flat transitions, and a poor match for an older house with real sills.
The published spec sheet
- Stated suction
- 12,000 PaSource: Dreame X40 Ultra, "12,000Pa Suction" — manufacturer listing on Amazon.com (retrieved 2026-09-01)
- Max climb height
- 22mm (0.87in)Stated by Dreame in its own model comparison, not on the product listing.Source: Dreame model comparison — L40 Ultra Gen 2 vs L40s Ultra, obstacle climbing height (retrieved 2026-09-01)
- Mop lift
- Removable, plus a stated 10.5mm raiseDreame quotes the height difference before and after mop lifting as 10.5mm; the pads can also be dropped at the dock entirely.Source: Dreame model comparison — mop lifting height difference (retrieved 2026-09-01)
- Main brush
- Liftable brushes with an extending side brushSource: Dreame X40 Ultra brush system — manufacturer listing on Amazon.com (retrieved 2026-09-01)
- Navigation
- AI navigation, system not named on the listingSource: Dreame X40 Ultra navigation — manufacturer listing on Amazon.com (retrieved 2026-09-01)
- Stated runtime
- Up to 198 minutesSource: Dreame X40 Ultra runtime — manufacturer listing on Amazon.com (retrieved 2026-09-01)
- Dock
- Self-emptying with 158F mop and washboard self-cleaning, auto refillSource: Dreame X40 Ultra dock — manufacturer listing on Amazon.com (retrieved 2026-09-01)
What the sheet says it does well, and what it does not
Strengths
- Mops detach at the dock instead of riding along raised
- Stated 198 minutes of runtime
- 12,000 Pa stated peak suction
Limits
- 22mm climb is mid-pack and well below the L40s and X50
- Large dock footprint for the mop-washing hardware
Who it is for
Mixed carpet and hard floor where you want the mop gone, not raised.
Who should skip it
Your thresholds are tall. Dreame's own comparison puts this generation's obstacle climbing at 22mm.
We name it as the pick to skip on one page, for reasons specific to what those pages are about:
- Do you need a robot vacuum with mapping? — A genuinely good machine and the best spec sheet per dollar in Dreame's range - a published 22mm climb, a removable mop pad and a hot washboard dock. It is the skip on this page for one reason: Dreame describes its navigation as "AI navigation" and does not name the sensing hardware. That means you cannot tell from the product page whether this robot maps with a laser or with a camera, which is a capability question and a privacy question at once. Three of Dreame's five current models carry the same blank. If how the robot sees your house matters to you, buy from a maker that says.
Where we recommend it
- Robot vacuums that mop
- Robot vacuums for mixed carpet and hard floors
- Best robot vacuums for hardwood floors
- Best robot vacuums for pet hair on hardwood floors
- Best robot vacuums for vinyl plank floors
- Robot vacuums with self-cleaning docks
- How to stop the mop smelling musty
- When to replace a robot mop pad
- Best robot vacuum and mop combos
- The best mop combos for pet hair
- When a robot vacuum battery dies
- Dreame vs Roborock
- Are robot vacuums banned in the US?
- The best Dreame robot vacuum
- Roomba alternatives
- The best mid-range robot vacuums
- What to look for in a robot vacuum
How we assessed this
By reading what Dreame publishes and recording it with its source. We have never owned, handled or measured this machine, and nothing above is written as though we had. Where the manufacturer publishes nothing, the row says so rather than borrowing a number from somewhere else. The full method is on how we pick, and if a figure here does not match the page it links to, tell us and we will correct it with a date.
Questions people actually ask
+ Does Dreame publish a threshold climb height for the Dreame X40 Ultra?
Yes — 22mm (0.87in). Stated by Dreame in its own model comparison, not on the product listing. Compare it against every other model on the cross-brand climb table.
+ What suction does the Dreame X40 Ultra have?
Dreame states 12,000 Pa. Remember that pascal ratings are not standardized between manufacturers, so that figure ranks this model within Dreame's own range and does not compare across brands — the full explanation.
+ Is the Dreame X40 Ultra good for pet hair?
Its main brush is described as liftable brushes with an extending side brush, which is the specification that matters most in a hair-heavy house — more than suction. The brush comparison sets out what each design does.
+ Can the Dreame X40 Ultra mop over carpet?
Dreame states a mop lift of Removable, plus a stated 10.5mm raise. Dreame quotes the height difference before and after mop lifting as 10.5mm; the pads can also be dropped at the dock entirely. Compare that against your own pile depth rather than against other models — mop lift compared.
+ Who should skip the Dreame X40 Ultra?
Your thresholds are tall. Dreame's own comparison puts this generation's obstacle climbing at 22mm.
#ad how we are funded · price as of October 17, 2026