Nuna also sells these two together as the TRVL + PIPA rx | Nuna Travel Systems.
This answer is for the Nuna TRVL.
Key specs
Whole set, list prices
$1125
Weight with carrier
21.2 lb
Seat rated to
30 lb, 30 in
On planes (FAA)
Yes
Stroller folded
L 24 x W 20.25 x H 11 in (armbar removed)
About this pair
The Nuna Pipa RX attaches straight to the Nuna TRVL; there is nothing extra to buy. With the carrier on, you are pushing about 21.2 lb (13.6 lb stroller, 7.6 lb carrier). The seat itself is rated up to 30 lb and up to 30 in, per Nuna.
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8 other infant seats fit the Nuna TRVL; Nuna Pipa (original), Nuna Pipa Aire, Nuna Pipa Aire RX and 5 more need no adapter at all.
Summary from the makers' published data.
How to set up the Nuna Pipa RX on the Nuna TRVL
What you need
The Nuna TRVL
The Nuna Pipa RX carrier (its car base stays in the car)
The Nuna carrier attaches straight to the stroller frame; the manuals below show exactly where.
Before every walk
Check that the carrier is locked on both sides the way your manual describes. How we check our answers
Last check: give the carrier handle a gentle tug. A seat that is fully latched does not lift off.