Nuna PIPA rx
The Nuna PIPA rx rear-faces up to 30 lb, is 17.5 in wide, and weighs 7.6 lb, per Nuna. Nuna infant carrier with the RELX base, which has a steel stability leg and an anti-rebound panel and four recline positions.
- $409.99List price
- 30 lbRear-facing to
- 7.6 lbSeat weight
- 17.5 inWidth
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PIPA rx: key facts
- The Nuna PIPA rx rear-faces from 4 to 30 lb and 16 to 30 in tall, per Nuna.
- Outgrown by height: "Top of child's head should be at least 1 inch below top of child restraint."
- It installs with LATCH (PIPA RELX base, rigid latch), seat belt or baseless (belt path).
- Nuna lists it as certified for aircraft ("This child restraint is certified for use in commercial aircraft with or without the base.").
- It's 17.5 in wide at the widest point and weighs 7.6 lb without the base.
From Nuna's manual and published specs. Always follow the limits on your seat's labels.
How the PIPA rx stacks up
Against the 74 infant car seats we track. The shaded band is where the middle half of them fall; the dot is this one.
The same as most infant car seats (30 lb).
Within the typical range for infant car seats (16.9 in to 17.5 in).
Below the typical range for infant car seats (8.2 lb to 9.8 lb).
Within the typical range for infant car seats ($219.99 to $449.99).
What sets the PIPA rx apart
Measured against the 74 infant car seats we compare, from each maker's published specs.
- 9th lightestof the 58 infant car seats with it published: 7.6 lb
- Width: 17.5 inin the middle half of the 41 infant car seats that publish it (16.9 in to 17.5 in)
Next to its closest matches
- Clek LiingoNext to it, the PIPA rx is 0.6 in wider; 1.4 lb lighter; has base included (the Liingo doesn't); has load leg (the Liingo doesn't).
- Maxi-Cosi AmbraNext to it, the PIPA rx is 0.6 lb heavier.
- UPPAbaby Aria V2Next to it, the PIPA rx is 0.5 in wider; 1.6 lb heavier.
Strollers named with the PIPA rx
31 strollers on Cribpicks are named with the PIPA rx in a maker's fit list. Listed stroller fit: All Nuna strollers with adapters, plus select premium strollers.
| Stroller | How it is listed |
|---|---|
| Silver Cross Clic | Named by Silver Cross, no adapter |
| Bugaboo Butterfly 2 | With the Butterfly 2 Car Seat Adapters |
| Bugaboo Butterfly 2 Plus | With the Butterfly 2 Car Seat Adapters |
| Bugaboo Donkey 5 | With the Donkey 6 Car Seat Adapters (Mono/Duo) |
| Bugaboo Donkey 5 Twin | With the Donkey 6 Twin Car Seat Adapters |
| Bugaboo Donkey 6 | With the Donkey 6 Car Seat Adapters (Mono/Duo) |
| Bugaboo Donkey 6 Twin | With the Donkey 6 Twin Car Seat Adapters |
| Bugaboo Dragonfly | With the Dragonfly Adapters for Maxi-Cosi Car Seats |
| Bugaboo Dragonfly Plus | With the Dragonfly Adapters for Maxi-Cosi Car Seats |
| Bugaboo Fox 5 Renew | With the Fox 5 Renew Car Seat Adapters |
| Bugaboo Kangaroo | With the Kangaroo Car Seat Adapters |
| Bumbleride Speed | With the Indie/Speed Car Seat Adapter (Maxi-Cosi/Nuna/Cybex/Clek) |
And 19 more.
Matched by brand and model name. Fit can depend on the model year, so check yours with both makers.
Flying with the PIPA rx
Nuna's label: “This child restraint is certified for use in commercial aircraft with or without the base.” It is 17.5 in wide at its widest point.
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
- Stability leg and anti-rebound panel on base
- Four recline positions
- Made without added flame-retardant chemicals, per Nuna
- FAA certified with or without base (per the maker)
Worth checking
- Heavier than the aire models (7.6 lb)
- 30 lb maximum
Where to buy the PIPA rx
Prices and availability change. We may earn a commission from some links.
- 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
| Nuna PIPA rx | |
|---|---|
| Type | Infant car seat |
| List price | $409.99 |
| Rear-facing weight | 4–30 lb |
| Rear-facing height | 16–30 in |
| Seat weight | 7.6 lb |
| Base weight | 16.8 lb |
| Width | 17.5 in |
| Head rule | Top of child's head should be at least 1 inch below top of child restraint. |
| Base included | Yes |
| Newborn insert | Organic jersey infant insert; product page FAQ: 'The infant insert should be removed when your child weighs 11 lbs.' |
| Installation | LATCH (PIPA RELX base, rigid latch), seat belt, baseless (belt path) |
| Load leg | Yes |
| Anti-rebound bar | Yes |
| Rotates | No |
| Recline positions | 4 |
| Works with strollers | All Nuna strollers with adapters, plus select premium strollers |
| Stroller adapters | Nuna adapters for other brands (not listed on page) |
| Handle in the car | Manual: 'The handle has 3 locked positions (including carry position).' 'Nuna recommends to have the handle in the carry position when in the vehicle.' 'Handle MUST NOT contact the vehicle interior (side of car or seat in front) when installed.' |
| Aircraft label | Certified for aircraft, per the maker |
| No added flame retardants | Yes |
Compare the PIPA rx with
How each closest rival differs from the PIPA rx, from the makers' specs.
- ClekLiingorear-facing to 30 lb16.9 in wide$399.99
- 0.6 in narrower
- 1.4 lb heavier
- $10 less
- Maxi-CosiAmbrarear-facing to 30 lb7 lb$399.99
- 0.6 lb lighter
- $10 less
- UPPAbabyAria V2rear-facing to 30 lb17 in wide$399.99
- 0.5 in narrower
- 1.6 lb lighter
- $10 less
- CybexAton G2rear-facing to 30 lb17.5 in wide$399.95
- 1.4 lb heavier
- $10 less
PIPA rx: questions answered
From Nuna's published specs, last checked 2026-11-06.
Does the Nuna PIPA rx rear-face longer than other infant seats?
24 of the 97 infant seats we track rear-face to a higher weight than its 30 lb. The highest is the Baby Jogger City GO 2 at 35 lb. NHTSA: stay rear-facing "until he or she reaches the top height or weight limit allowed by your car seat's manufacturer." (NHTSA)
Will the Nuna PIPA rx fit three across or in a small car?
It's wider than 82% of the infant seats we track, at 17.5 in. The narrowest is the Evenflo NurtureMax at 14.8 in. Fit depends on your vehicle; check each seat's manual and your vehicle manual. 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.
Is the Nuna PIPA rx heavy to carry?
With a 7.5 lb newborn inside you'd lift about 15.1 lb, and that grows as your baby does. The carrier is lighter than 87% of the infant seats we track. See the lightest infant seats.
Can you use the Nuna PIPA rx in a taxi or Uber without the base?
Yes. Nuna lists a baseless install with the vehicle belt; see the manual for the belt routing.
Can you bring the Nuna PIPA rx on a plane?
Yes, Nuna 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 7.6 lb to carry through the airport.
PIPA rx or Liingo: what's different?
By the makers' specs, the PIPA rx has a load leg; the PIPA rx has an anti-rebound bar; the Liingo lists for $10 less. See every spec side by side.
Is it OK to buy a used PIPA rx?
NHTSA publishes guidance on used car seats on its car seat page. 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 infant car seats
- BritaxCypressrear-facing to 30 lb16.9 in wide$379.99
- NunaPIPA airerear-facing to 30 lb17.5 in wide$440
- Peg PeregoPrimo Viaggio Nidorear-facing to 30 lb8.2 lb$449.99
- Baby JoggerCity GO 2rear-facing to 35 lb17.3 in wide$399.99
- ChiccoKeyFit Max Zip ClearLuxrear-facing to 30 lb17 in wide$349.99
- Peg PeregoPrimo Viaggio Urban Mobilityrear-facing to 30 lb17 in wide$349.99
Where these specs come from
- nunababy.com/usa/pipa-rx-infant-car-seat-with-relx-base
- nunababy.com/media/catalog/product/N/u/Nuna_PIPArx_UserManual_US…
- nunababy.com/usa/pipa-relx-car-seat-base
- nunababy.com/usa/pipa-car-seat-base
Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.