Which Car Seats Have Load Legs?
A Load leg, also known as a foot prop or stability leg, is an energy management feature that limits downward rotation toward the front of the vehicle. Statistically, frontal crashes account for the majority of crashes so we design car seats to protect children in them. Car seats move toward the point of impact, so rear-facing car seats rotate down and toward the front of the vehicle in a frontal impact.
According to FMVSS 213, the safety standard to which all U.S. car seats are tested, rear-facing car seats may rotate downward up to 70° and still pass testing. During this downward rotation, the child will also ramp up (slide up) the car seat. As the child slides up the seat, crash forces are felt in the neck and shoulders as they contact the harness.
Harnesses, seat belts, and LATCH belt webbing are designed to stretch for energy management. This stretching of the webbing—plus any removal of slack in the harness—and vehicle seat cushion compression causing downward rotation, is called “payout.” Payout happens before ride down, which is when the car seat and vehicle come to a stop. The more movement a child has during a crash, the more chance for injury, which is why child passenger safety technicians emphasize snug harnesses and installations.
Eliminating the downward rotation by using a load leg means the child stays down in the seat and payout is reduced. This is a good thing because the less time that’s spent on payout, the more time that’s spent on ride down, which is when the car seat itself starts absorbing energy. The car seat stays more upright allowing the back of the car seat to absorb energy instead of the harness; the crash forces are distributed along the child’s back instead of concentrated on the neck and shoulders.
Another benefit from load legs, especially in smaller vehicles, is that by allowing the car seat to stay more upright in a crash, there’s less of a chance a child will ramp up and out of the car seat and strike the vehicle interior with their head. Head injuries lead the list of injuries to rear-facing children in vehicle crashes.
The video below compares a Cybex Aton 2 without its load leg to an Aton 2 with its load leg. You can see how a load leg affects downward rotation. Be sure to notice the position of the dummy’s head on each side of the video.
Another thing to point out with load legs involves FMVSS 213 and testing with load legs. The test sled for 213 doesn’t have a floor, so load legs can’t officially be included in federal testing. Frustratingly enough, even with all the new regulatory changes, NHTSA won’t add a floor to the test sled to officially crash test load legs because it feels that caregivers won’t use the load leg feature. I wish we were kidding.
When manufacturers test their car seats with load legs, they add a floor piece onto the sled so the load leg has a place to rest and NHTSA allows this practice. It’s part of that “extra testing” that manufacturers do to their car seats that their marketing department then labels on the box. This is why load legs aren’t required to be used and bases with this accessory have a storage area for them to be tucked away.
What about Rebound?
We can’t really talk about load legs without discussing rebound. Rebound is the action of a rear-facing car seat when the top part of it moves toward the back seat upon pushing or collision. On a car seat without a load leg, after the downward rotation, there will be rebound into the vehicle seat back (remember Newton’s 3rd Law: for every action, there is an equal and opposite reaction). All the energy that goes into stretching of webbing and vehicle seat compression has to have a place to go, hence rebound. Rebound with a typical rear-facing car seat usually has 1/3 the energy of the initial crash by the time the car seat impacts the vehicle seat. On a car seat with a load leg, since the downward motion is limited and that energy has been absorbed by the vehicle and the car seat, the rebound will be reduced.
Britax nicely explains rebound in this video (though note that the RF is 5 times safer has been found to be erroneous, but we do know RF to the limits of the car seat is safest).
You can also see rebound on a car seat that doesn’t have rebound control (either with a load leg or with an anti-rebound bar) below. Remember that crash tests look scary, but that as stated above, rebound has typically 1/3 the energy of the initial crash. While there have been injuries to legs on rebound, they have been relatively minor (compared to what can happen forward-facing) and very few. All rear-facing car seats without rebound control will look similar to this one.
On viewing the Clek Liing rear-facing only car seat crash test video below, you can see that the carrier moves slightly on the base, but the base doesn’t move due to installation with rigid LATCH and the load leg. Energy is transferred to the floor and Clek claims crash forces are reduced by more than 40%. Energy is released on rebound but is slight compared to a car seat lacking the load leg feature.
There are car seats, both rear-facing only infant seats and convertible seats, that have anti-rebound bars (ARBs); it’s a more common feature than the load leg. Anti-rebound capability is required in Canada, so Canadian car seats may have it built in to the structure versus having an ARB that must be attached rear-facing.
Alternatives to Using a Load Leg
One alternative to using a load leg on a rear-facing only car seat is installing the carrier without the base Euro-style. This requires that the carrier have a clip or other feature on the back of the seat allowing the shoulder belt to be routed behind the child’s head; not all seats allow this. Having the shoulder belt wrapped around behind the seat supports it and keeps it from rotating down.
Another is installing a convertible using a rear-facing tether Australian-style (Aussie-style). The tether wraps around the back of the car seat and attaches to the vehicle’s tether anchor. Clek has the Q-Tether for its Foonf and Fllo convertibles and UPPAbaby allows the tether to be used Aussie-style on the Knox and the Rove.
How to Use A Load Leg:
Load legs must firmly touch the floor, but not lift the base off the vehicle seat or alter the advised recline angle.
Check that the load leg is locked into position. Most have a visual cue to help you determine if it’s locked correctly.
Some vehicle seats may be too deep for the load leg to unfold naturally over the edge of the cushion. If that’s the case, store the load leg or use a different back seat position.
Some center seats have a hump on the floor that makes it incompatible with fully extending the load leg. If that’s the case, store the load leg or use a different back seat position.
Check your vehicle owner’s manual if you own a vehicle with in-floor storage areas. Some vehicles explicitly forbid the use of load legs over these storage areas.
For being around a long time, load legs are certainly starting to make a splash in the market here. As with any car seat, a base with a load leg may not work well in your vehicle or with other car seats in your car. Because of their reduction in crash forces, a car seat with a load leg is a safety feature worth considering if you can find one in your price range with other features you like and that you’ll correctly use each ride.
Here’s a list of car seats* that have anti-rebound bars or anti-rebound height built into their bases separated out into rear-facing only infant seats and convertible/all-in-one car seats.
*As Amazon Affiliates, anytime you make a purchase through one of our links, we earn a small commission at no cost to you. Thank you for reading our articles and supporting The Car Seat Pros! We strive to bring you the best car seat reviews!
Car Seats with Load Legs
Updated 10-28-26
| Model | Price | Rigid LATCH |
|---|---|---|
| Clek Liing | $499.99 | Yes |
| Cybex Cloud G Pro | $549.95 | Yes |
| Cybex Cloud T | $649.95 | Yes |
| Doona X | $249.99 | Yes |
| Evenflo LiteMax NXT | $249.99 | No |
| Evenflo LiteMax NXT with SensorySoothe | $249.99 | No |
| Evenflo Revolve180 LiteMax NXT | $299.99 | No |
| Graco SnugRide 35 DLX | $269.99 | No |
| Maxi-Cosi Ambra | $399.99 | Yes |
| Maxi-Cosi Peri 180° | $499.99 | No |
| Maxi-Cosi Mico Luxe+ | $339.99 | No |
| Bugaboo Turtle Air Shield by Nuna | $649 | Yes |
| Nuna PIPA aire | $440 | Yes |
| Nuna PIPA aire rx | $650 | Yes |
| Nuna PIPA rx | $550 | Yes |
| Peg Perego Viaggio | $279.99 | No |
| Peg Perego Viaggio Nido | $449.99 | No |
| Peg Perego Viaggio Lounge | $499.99 | No |
| Romer Juni | $499.99 | Yes |
| UPPAbaby Aria V2 | $449.99 | No |
| Model | Price | Rigid LATCH |
|---|---|---|
| Axkid ONE 3 (A RF only car seat to 65 lbs.) | $899 | Yes |
| babyark Classic | $790 | Yes |
| babyark Smart | $990 | Yes |