Double

Mockingbird

Mockingbird Single-to-Double 3.0

Starting at $549 as a single, it becomes a double with a $175 second seat kit. Two seats weigh 36 lb in total, each seat carries up to 45 lb, and the one-hand fold stands upright.

Weight: 28 lb; maker's figure
Folded size: 18 x 26 x 34 in; a 9.21 cu ft box
Max child weight: 50 lb; per seat

Best for: One child now, with the option of a second seat later

~$549list price at the last catalog update

What it does well

Second seat is a $175 add-on rather than a different stroller
Folds with one hand, even as a double
25 lb basket; of the 14 doubles with a rating, only the two Donkey 6 models rate higher
Car seat adapter names models from ten brands

What it gives up

36 lb with two seats is heavy to lift
Second seat and car seat adapter are separate purchases
Folded it is 34 x 26 x 18 in
Seat limit drops from 50 lb to 45 lb in double mode

What you lift

28 lb as Mockingbird weighs it.

Source: Mockingbird spec: "Stroller weight: 28 lbs not including second seat, or 36 lbs with two seats" (its FAQ says about 27 and 35 lb)

The first months: Needs a bassinet, insert or car seat (sold separately). Mockingbird: from birth with the Infant Seat Insert, Bassinet or Car Seat Adapter (all sold separately).

Why makers’ weights don’t always compare

Infant car seats

Seat family	How it attaches	Models the maker names
Baby Jogger infant seats	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Baby Jogger City GO 2
Britax / BOB infant seats	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Britax B-Safe 35, B-Safe Gen2 or Gen2 Flex Fit, Willow S or SC
Chicco KeyFit / Fit2	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Chicco Fit2, Fit2 Adapt, KeyFit, KeyFit 30, KeyFit 35 and Max variants
Clek Liing	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Clek Liing, Liingo
Cybex Aton / Cloud	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Cybex Aton M, Cloud Q
Graco infant seats	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Graco GoMax, SnugRide SnugFit, SnugFit 35 variants, SnugLock 35 variants, Premier SnugFit XT, SnugRide Lite LX
Maxi-Cosi Mico / Coral	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Maxi-Cosi Mico Luxe or Luxe+, Peri 180
Nuna PIPA series	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	Nuna PIPA, PIPA RX, PIPA Aire, PIPA Aire RX
UPPAbaby Mesa	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	UPPAbaby Mesa (2020 or newer), Mesa v2, Mesa v3, Mesa Max
UPPAbaby Aria	Adapter: Mockingbird Car Seat Adapter ($50, sold separately)	UPPAbaby Aria v1 or Aria v2

Source: Mockingbird FAQ, with its Car Seat Adapter, same list as the Single Stroller: Baby Jogger City GO 2; Britax B-Safe and Willow models; Chicco Fit2/KeyFit family; Clek Liing, Liingo; Cybex Aton M, Cloud Q; Graco family; Maxi-Cosi Mico Luxe/Luxe+, Peri 180; Nuna PIPA family; UPPAbaby Aria and Mesa (Aria and Mesa Max are not compatible for twins)

The whole car-seat matrix

Specifications

Approx. price: ~$549
Type: Double
Double layout: Tandem (in line)
Weight: 28 lb
Newborn option: Needs a bassinet, insert or car seat (sold separately)
Folded size: 18 x 26 x 34 in
Carry-on check: Over by 12 in (3 sides over)
Folded box: 9.21 cu ft
Unfolded size: 33 x 26 x 40 in
Fold: One-hand fold, stands when folded; Mockingbird: "One-hand fold, auto-locks and stands upright when folded"
Basket: 25 lb
Max child weight: 50 lb per seat; Mockingbird: "Up to 50 lbs for the stroller seat, or up to 45 lbs in each seat in double mode"
Recline: 5 positions (Reversible seats with 5-position recline)
Car seats: 10 seat families: 10 with an adapter
Single to double: Starts as a single; the 2nd Seat Kit ($175, sold separately) adds a second seat

Mockingbird publishes no handlebar height for this model, so taller parents have nothing to check it against here.

The carry-on check

Over by 12 in (3 sides over)

Side	Folded	Limit	Over
Longest	34 in	22 in	+12 in
Middle	26 in	14 in	+12 in
Shortest	18 in	9 in	+9 in

Measured against the Delta Air Lines carry-on size limit. How the check works

Source: Mockingbird spec: "Folded: 34” x 26” x 18”"

Features

Single-to-double with 2nd Seat Kit
One-hand self-standing fold
Reversible seats with 5-position recline
25 lb basket
All-wheel suspension
Lockable front wheels
FullShade canopy
Lifetime warranty

Others in the same part of the catalog

Chicco~$360

Chicco Cortina Together

Double

Weight: 34 lb
Folded size: 47.8 x 23.5 x 16.8 in
Handlebar height: not published

Best for: Twins in Chicco car seats on a budget

Check price on Amazon

Zoe~$529

Zoe Twin V2

Double

Owner reports

Weight: 23 lb
Folded size: 11.5 x 30 x 28 in
Handlebar height: up to 43 in

Best for: Twins or siblings who will ride for years

Joovy~$570

Joovy Caboose RS

Double

Weight: 30.2 lb
Folded size: 50.4 x 24.1 x 13.4 in
Handlebar height: not published

Best for: A newborn on the platform bassinet and a big kid standing behind

Check price on Amazon