Maker lists it for Butterfly 2 and Butterfly 2 Plus.
About this pair
The Nuna Pipa Aire RX goes on the Bugaboo Butterfly 2 with the Bugaboo Butterfly 2 car seat adapter (model 400018003), about $69.95. With the carrier on, you are pushing about 22.2 lb (16 lb stroller, 6.2 lb carrier). The seat itself is rated up to 30 lb and up to 30 in, per Nuna.
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18 other infant seats fit the Bugaboo Butterfly 2.
The answer is not the same on every Butterfly: it differs on the Butterfly (original), as the table below shows.
Summary from the makers' published data.
How to set up the Nuna Pipa Aire RX on the Bugaboo Butterfly 2
What you need
The Bugaboo Butterfly 2
The Nuna Pipa Aire RX carrier (its car base stays in the car)
The Bugaboo Butterfly 2 car seat adapter (model 400018003)
The adapter maker shows the fitting steps in pictures; see the manuals below.
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.
Bugaboo says it needs an adapter (Butterfly 2 car seat adapter).
“Car seat compatibility: Bugaboo Turtle Air Shield by Nuna, Bugaboo Turtle Air by Nuna, Bugaboo Turtle One by Nuna / Nuna Pipa Lite, Nuna Pipa Lite LX, Nuna Pipa, Nuna Pipa RX, Nuna Pipa Aire, Nuna Pipa Aire RX, Nuna Pipa Urbn”