If you're going out to look at all-terrain strollers, it's important you know what is (and isn't) important in their design. Just because a stroller looks chunky or has camo on it doesn't make it all-terrain. You're going to have to quite literally kick the tires and (less literally) lift the hood to find a setup that suits your lifestyle.
1 - Check the seat
The seat is king for little ones, and companies that make all-terrain strollers are aware of how bumpy the ride can get. You want to find a model that distributes force and impact evenly, and that is also inclined in a way to keep that kinetic energy off the child's head and/or neck. It's also important that the stroller allows for baby seats or a bassinet option because infants have even more protection needs than bigger kids.
It's also important that your child is protected from weather and sun, so there should be a method for that, like a canopy. The last thing your baby wants is the sun in their face while you trudge up a hill - they'll grow up resenting the sun (and possibly you) for reasons they can't explain.
You also want to make sure there's a 5-point harness that secures your baby to the seat. You're going to be doing bumpy stuff; you want your kid to enjoy it, not get shaken like a James Bond Vesper.
2 - Kick the tires
You don't want the air-inflated tires of a jogging stroller or the hard plastic wheels of a basic one. Instead, your stroller should have chunky, durable tires capable of withstanding, again,all-terrain. You also want to make sure they have a good grip, for situations when things suddenly get wet. It can be quite unsettling to be hiking on rocks and then a sudden spring shower soaks the path, and you find yourself slipping all over the place.
3 - Gotta have brakes
If you're jogging or hiking and the speed or incline gets out of control, you need the extra handling that brakes provide. Being able to lock the front wheels is good, but you also want responsive brakes you can manipulate quickly and simply.
4 - Suspension is critical
Basic strollers function to help you move baby from point A to point B, and usually through simple, soft terrain. An all-terrain stroller helps you navigate some tough country, which is awesome, but it can be rough on both your stroller and the baby if the suspension is bad. The entire structure should be built to withstand bumps, bonks, and the intense bounces that change in terrain can bring. Moreover, it shouldn't transfer that shock to your baby.
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