Baby Jogger Summit X3 Double vs Valco Ultra Duo S2

The Ultra Duo S2 is 7 lb lighter. The Summit X3 Double lists for $49.96 less. The Ultra Duo S2 folds smaller (6.4 vs 9.9 cu ft).

Only the differences are shown.

Baby Jogger Summit X3 DoubleValco Baby Ultra Duo S2
List price$799.99Lowest price$849.95
Weight37 lb30 lbLightest
Folded size15.3 × 32.5 × 34.3 in9.9 cu ft31 × 27.5 × 13 in6.4 cu ftSmallest fold
Open size53.1 × 32.5 × 40.5 in32.5 × 27.5 × 42 in
Seat holds up to50 lbHolds the most45 lb
Seat layoutSide by sideSide by side
Seats22
Each seat holds up to50 lb45 lb
Total weight limit114 lbNot listed
Open width32.5 in27.5 in
Infant car seats that fitInfant car seat with Baby Jogger/Graco car seat adapter for summit X3 double (sold separately); number not stated1-2 infant car seats (adapter sold separately)
Seat setupsforward-facing only (except with infant car seat)reversible seats (parent- or world-facing), independent recline
Standing board or benchNoNo
Child height up to44 inNot listed
From birth?Yes, seat lies flatYes, seat lies flat
Newborn add-onManual: suitable from birth to 5 years; maker advises consulting pediatrician before jogging with baby under 6 months; infant car seat via adapterNear-flat recline with adjustable footrest 'built-in cocoon for newborns'; bassinet compatible; car seat(s) via adapter
Seat sizeNot listed9 in wide, 17 in seat back
Seat reclineNear-flatNear-flat
Seat faces you or the worldNoYes
One-hand foldNot listedYes
Fits airline overhead binNot listedNo
Converts to a doubleNoNo
Basket10 lb, Wide but shallow basket22 lb, Measures 25 x 9 x 24 inBiggest basket
Car seatsNot listedFits 1 or 2 infant car seats with adapters sold separately
Car seat adaptersBaby Jogger Car Seat Adapters for Summit X3 Double & Graco infant car seat ($49.99; shown 'currently not available')Valco car seat adapter (sold separately)
Folds with the seat onNot listedYes
BrakeFoot brakeNot listed
WarrantyNot listed1 year
Handlebar heightFixed42 in
Wheels and suspensionAir-filled rubber tires, removableInfinity wheels with built-in suspension
CanopyCanopies with mesh vents and peekaboo windowsThree-stage extended, UPF 50+, magnetic peek-a-boo window

Baby Jogger Summit X3 Double

A side-by-side jogging stroller for two children, built for runs and rougher paths.

  • Air-filled tires for rough ground
  • Each seat holds up to 50 lb
  • Quick one-pull fold
  • Heavy at 37 lb
  • About 32.5 in wide, may not fit through narrow doors

Valco Ultra Duo S2

A side-by-side double with reversible seats, built to fold small enough for a car trunk.

  • Seats face either direction
  • Independent near-flat recline
  • Folds with both seats attached, facing either way
  • Heavy for a double at 30 lb
  • Car seat adapters sold separately
Ask the meadow

Summit X3 Double or Ultra Duo S2?

Answers come from each maker's published specs. Safety and health questions link to the agency or medical source.

Which is lighter, the Summit X3 Double or the Ultra Duo S2?

The Valco Ultra Duo S2 weighs 30 lb, 7 lb less than the Baby Jogger Summit X3 Double (37 lb).

Which folds smaller, the Summit X3 Double or the Ultra Duo S2?

The Ultra Duo S2 folds to about 6.4 cubic feet, versus 9.9 for the Summit X3 Double.

Is the Summit X3 Double cheaper than the Ultra Duo S2?

Yes. The Summit X3 Double lists for $799.99 and the Ultra Duo S2 for $849.95, a $49.96 difference. Sale prices change often.

Can both be used from birth?

Summit X3 Double: Yes, seat lies flat. Ultra Duo S2: Yes, seat lies flat.

Which one lasts longer?

The Summit X3 Double seat holds more: 50 lb versus 45 lb.

Still wondering? Write to us at hello@cribpicks.com and we'll look it up.