The Nuna Pipa Lite RX goes on the Baby Jogger City Select 2 with the Baby Jogger City Select adapter for Nuna seats (model 2013551), about $49.99. With the carrier on, you are pushing about 33.6 lb (26.71 lb stroller, 6.9 lb carrier). The seat itself is rated up to 32 lb and up to 32 in, per Nuna.
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11 other infant seats fit the Baby Jogger City Select 2.
Summary from the makers' published data.
How to set up the Nuna Pipa Lite RX on the Baby Jogger City Select 2
What you need
The Baby Jogger City Select 2
The Nuna Pipa Lite RX carrier (its car base stays in the car)
The Baby Jogger City Select adapter for Nuna seats (model 2013551)
Step by step
1Push the L and R adapter brackets into the stroller's mounting brackets until they click (left and right as seen facing the stroller).
2Press the handlebar adjustment button and slide the handlebar up.
3Fit the adapter's handlebar spacers just below the rubber grip on the handlebar.
4Set the car seat on the adapter and press down firmly until it clicks.