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Maxi-Cosi Romi

The Maxi-Cosi Romi rear-faces up to 40 lb, forward-faces up to 50 lb, and weighs 9.2 lb, per Maxi-Cosi. A Maxi-Cosi 2-in-1 convertible car seat.

  • $149.99List price
  • 40 lbRear-facing to
  • 50 lbHarness to
  • 9.2 lbSeat weight
See it on Maxi-Cosi's site

When does it expire?

Follow Maxi-Cosi

All convertible car seats

Romi: key facts

  • The Maxi-Cosi Romi rear-faces from 5 to 40 lb and 19 to 40 in tall; forward-faces with a harness from 30 to 50 lb and 34.4 to 44 in tall, per Maxi-Cosi.
  • Outgrown by height: "Rear-facing: 'The top of your child's head MUST be at least 1 in. (2.5 cm) below the top of the car seat.' Forward-facing: 'The top of your child's ears MUST be below the top of the car seat.'"
  • It installs with LATCH.
  • Maxi-Cosi says it expires 10 years after the date of manufacture.
  • Maxi-Cosi lists it as certified for aircraft ("'This restraint is certified for aircraft use.'").

From Maxi-Cosi's manual and published specs. Always follow the limits on your seat's labels.

How the Romi stacks up

Against the 39 convertible car seats we track. The shaded band is where the middle half of them fall; the dot is this one.

Expiration10 years

Within the typical range for convertible car seats (9 years to 10 years).

This one
7 yearsmiddle 10 years10 years
Rear-facing limit40 lb18th highest rear-facing limit of 38

Within the typical range for convertible car seats (40 lb to 50 lb).

This one
35 lbmiddle 40 lb65 lb
Forward-facing limit50 lb31st highest forward-facing limit of 38

Below the 65 lb most convertible car seats list.

This one
40 lbmiddle 65 lb65 lb
Weight9.2 lb2nd lightest of 25

Below the typical range for convertible car seats (21.6 lb to 27.9 lb).

This one
8 lbmiddle 25.2 lb31.3 lb
Price$149.9911th lowest price of 37

Within the typical range for convertible car seats ($129.99 to $499.99).

This one
$59.99middle $399.99$990

What sets the Romi apart

Measured against the 39 convertible car seats we compare, from each maker's published specs.

  • 2nd lightestof the 25 convertible car seats with it published: 9.2 lb
  • Forward-facing limit: 50 lbbelow the middle half of the 38 convertible car seats that publish it (65 lb to 65 lb)

Next to its closest matches

Flying with the Romi

Maxi-Cosi's label: “'This restraint is certified for aircraft use.'”

What airlines say about car seats:

  • American: “Each ticketed customer is allowed 1 stroller and 1 car seat to be checked free of charge” “If an unoccupied, adjoining seat is not available, the gate agent will check the safety seat to your final destination.” Source
  • Alaska: “We will transport your child's car seat and stroller free of charge as checked baggage.” Source
  • JetBlue: “Checking a child safety seat will not count towards your checked baggage allowance and there is no fee assessed” Source
  • Spirit: “One (1) car seat will be accepted per child as checked baggage at no charge.” Source
  • Frontier: “strollers and car seats can be checked for free.” Source
  • Allegiant: “There is no charge for checking or gate checking one car seat per fare-paying passenger.” Source
  • Breeze: “Child seats may be carried on board the aircraft if a seat has been purchased for the Infant or Child” Source

Quoted from each airline's page as of 2026-11-02.

Listed features

  • Low price
  • Light shell
  • Tether strap can double as a carry strap

Worth checking

  • Forward-facing limit is only 50 lb
  • Rear-facing limit is 40 lb and 40 in

Where to buy the Romi

Prices and availability change. We may earn a commission from some links.

good to know
  • Check for recalls: Search the agency's recall list with the model number and date code from the label: NHTSA recall search.
  • Car seat use and installation: see NHTSA's car seat page, which also lists free car seat inspection by certified technicians. Check the label and the maker's instructions, and ask your pediatrician about your child.

Full specs

Maxi-Cosi Romi
TypeConvertible
List price$149.99
Rear-facing weight5–40 lb
Rear-facing height19–40 in
Forward-facing weight30–50 lb
Forward-facing height34.4–44 in
Seat weight9.2 lb
Head ruleRear-facing: 'The top of your child's head MUST be at least 1 in. (2.5 cm) below the top of the car seat.' Forward-facing: 'The top of your child's ears MUST be below the top of the car seat.'
Newborn insertHead Pillow (on select models); no separate limit given in manual
InstallationLATCH
Load legNo
Anti-rebound barNo
RotatesNo
Aircraft labelCertified for aircraft, per the maker
No added flame retardantsYes
Expires after10 years

Compare the Romi with

How each closest rival differs from the Romi, from the makers' specs.

Ask the meadow

Romi: questions answered

From Maxi-Cosi's published specs, last checked 2026-11-06.

Does the Maxi-Cosi Romi rear-face longer than other convertible seats?

20 of the 50 convertible seats we track rear-face to a higher weight than its 40 lb. The highest is the Axkid One 3 at 65 lb. NHTSA: stay rear-facing "until he or she reaches the top height or weight limit allowed by your car seat's manufacturer." (NHTSA)

Can you bring the Maxi-Cosi Romi on a plane?

Yes, Maxi-Cosi lists it as certified for aircraft; look for the red-lettered label that says so. The FAA asks that a car seat go in a window seat so it doesn't block the aisle, and the crew will look for that label. It weighs 9.2 lb to carry through the airport.

Romi or Ellaris: what's different?

By the makers' specs, the Romi has no added flame retardants (maker's claim); the Ellaris lists for $20 less. See every spec side by side.

Is it OK to buy a used Romi?

NHTSA publishes guidance on used car seats on its car seat page. Maxi-Cosi lists a lifespan of 10 years from manufacture for this model. Check the label and the maker's instructions, and ask your pediatrician about your child.

Still wondering? Write to us at hello@cribpicks.com and we'll look it up.

More convertible car seats

  • Baby TrendTrooper SLIM 3-in-1rear-facing to 40 lbforward-facing to 65 lb$109.99
  • EvenfloTributerear-facing to 40 lbforward-facing to 40 lb$99.99
  • Safety 1stEllarisrear-facing to 40 lbforward-facing to 65 lb$99.99
  • Safety 1stSmooth Riderear-facing to 40 lbforward-facing to 50 lb$94.99
  • Disney BabyScenera Extendrear-facing to 40 lbforward-facing to 50 lb$89.99
  • CoscoEntradarear-facing to 40 lbforward-facing to 65 lb$89.98

Where these specs come from

Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.