Double Strollers, Explained

Look for compliance with ASTM F833, the current voluntary consumer safety specification for carriages and strollers, which is incorporated into the U.S. federal stroller rule (16 CFR Part 1227) enforced by the CPSC. The quickest shortcut is a JPMA certification seal: it means an independent lab tested that model against the current ASTM F833 requirements for brakes, stability, restraint systems, and locking mechanisms. Any reputable stroller sold in the U.S. should meet the applicable standard - but this is general product information, not a substitute for reading each model's own manual and safety labels.

Neither is inherently better; they trade off. Side-by-sides keep both kids level with equal views and are usually easier to steer, but they're wider - the good ones stay under about 30 inches so they still clear standard doorways. Tandems (in-line) are narrower but longer, can be harder to turn, and often give the rear child a limited view. For twins, many parents prefer a side-by-side or a bassinet-capable modular system; for an infant plus an older toddler, a tandem that seats the toddler behind a reclined infant can make more sense.

The harness is the single most important safety feature - it keeps a child from standing, climbing, or being ejected if the stroller tips or is jolted. Strollers for infants use a five-point harness (two shoulder, two hip, one crotch strap), and independent testing consistently favors keeping younger, smaller children in all five points. Manufacturers set their own guidance on when an older child may transition to fewer points, so follow the specific model's manual rather than a rule of thumb, and always keep the straps snug enough that you can slip only one or two fingers underneath.

Most full-size doubles carry roughly 45 to 50 pounds per seat, and many also list a height limit (often around 40 to 45 inches) that children reach before the weight cap. Newborns need either a bassinet, a compatible infant car seat, or a seat that reclines fully flat, because young babies can't support their own heads or airways upright - so a stroller's "from birth" claim depends on which accessory you pair with it. Always confirm the exact per-seat limits printed on the model you buy.

Engage the parking brake every time you stop, especially on any slope, and use the wrist or tether strap on hills. Don't hang heavy bags from the handlebar - the extra leverage over two seats is a real tip-over risk, so load the storage basket instead. Buckle both children into their harnesses on every trip, keep fingers clear of folding joints, and periodically check that the frame locks fully open and the wheels and brakes aren't worn. Register the stroller with the manufacturer so you're notified of any recall affecting your model.

For a growing family it usually is. A modular single-to-double lets you buy once, start with a newborn in a single or bassinet configuration, and add a second seat when the next child arrives - which is typically cheaper and less cluttered than owning both a single and a full double. The trade-off is that these systems get long and heavy once the second seat is on, and some are sold direct-to-consumer only, so you can't test-push one in a store first.