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  • Britax Roundabout 55 Convertible Car Seat, Onyx (Prior Model)
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Britax Roundabout 55 Convertible Car Seat, Onyx (Prior Model)


Currently unavailable.
We don't know when or if this item will be back in stock.
  • Safecell technology features safecells designed to compress in a crash, significantly lowering the center of gravity and counteracting the forward rotation of the child seat which normally propels the child toward the front seat
  • Integrated steel bars strengthen the connection to the vehicle and reduce forward flexing of the child seat during a crash
  • Energy-absorbing versa-tether features a staged-release tether webbing to slow the forward movement, reducing the crash forces reaching the child, and a two-point attachment to minimize forward rotation while anchoring the top of the child seat
  • Side Impact Protection comprised of deep side walls lined with energy-absorbing EPP foam distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body
  • Tangle-Free, Five-Point Harness distributes crash forces across the strongest parts of the body and provides a secure fit
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This item’s packaging will be visible when delivered and cannot be gift-wrapped.

There is a newer version of this item:

Britax Roundabout G4.1 Convertible Car Seat, Onyx
$159.99
(17)
Usually ships within 2 to 4 months.

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Product Information

Technical Details
Item Weight17.6 pounds
Product Dimensions21 x 18.5 x 26 inches
UPC652182070816
Item model numberE9BC71A
Minimum weight recommendation5 Pounds
Maximum weight recommendation55 Pounds
Batteries requiredNo
  
Additional Information
ASINB005UBCHE6
Best Sellers Rank #52,521 in Baby (See top 100)
Shipping Weight20.8 pounds
ShippingCurrently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  
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Product Description

Product Description

The Britax Roundabout 55 convertible car seat is designed for children rear facing from 5 to 40 pounds and forward facing from 1 year and 20 lbs up to 55 pounds. The Roundabout 55 achieves revolutionary head safety through the use of Britax SafeCell Technology, integrated steel bars, and versa-tether that work together to minimize head excursion and reduce the risk of head injury during a frontal impact. The Roundabout 55 also incorporates Britax side impact protection, offers a five-point harness, and multiple buckle and recline adjustments. A body pillow is provided for comfort.

Amazon.com

The BRITAX ROUNDABOUT 55 Convertible Car Seat achieves optimum head safety through the combination of BRITAX SafeCell Technology, integrated steel bars, and a Versa-Tether, which work together to minimize head excursion and reduce the risk of head injury during a frontal impact. The seat fits children in the rear-facing position weighing from 5 to 40 pounds, and children in the forward-facing position starting at one year old and 20 pounds, up to 55 pounds.

callout box top

ROUNDABOUT 55
Convertible Car Seat
(Isabella)

At a Glance:
  • Age/Weight Requirements: In rear-
    facing position, fits children weighing 5 - 40 pounds; in forward-facing position, fits children 1+ years old weighing 20 - 55 pounds

  • Warranty: 1-year
    limited warranty

callout box bottom
Britax Roundabout 55 Convertible Car Seat
Available in (from left to right):
Onyx, Davenport,
Smokey Pearl, and Isabella.
Britax Roundabout 55 Convertible Car Seat
Safety features include SafeCell Technology and True Side Impact Protection.
View larger
.
Britax Roundabout 55 Convertible Car Seat
Comfort features include dual recline positions and high-density comfort foam.
(Shown here in Davenport.) View larger.
BRITAX 360 Degree Protection
The BRITAX ROUNDABOUT 55 features technologies that work to minimize injury to your child during a crash from any direction, including both frontal and side impact crashes - the most frequent types of crashes. These technologies work together with other features on the car seat to minimize injury to your child during a crash by:

  • keeping your child in the vehicle,
  • diverting crash forces away from your child,
  • helping to slow down your child's body,
  • minimizing movement of your child, and
  • protecting your child's brain and spinal cord.
SafeCell Technology for Advanced Head Safety
Designed with SafeCell Technology, the ROUNDABOUT 55 features SafeCells, which are engineered structures located in the base of the seat designed to compress in the event of a crash. This compression significantly lowers the center of gravity and counteracts the forward rotation of the car seat, delivering unprecedented performance in a crash.

The ROUNDABOUT 55 also features integrated steel bars, which strengthen the connection to the vehicle and reduce the forward flexing of the car seat. In addition, the energy-absorbing Versa-Tether anchors the top of the car seat and minimizes forward rotation to reduce the crash forces that can reach your child if an accident occurs. These three features work together as a system to provide revolutionary head safety protection for your child.

Side Impact Protection for Added Security
To keep your child safe in the event of a side-impact collision, the ROUNDABOUT 55 includes Side Impact Protection. Side Impact Protection is a system composed of a rigid seat shell with deep side walls and energy-absorbing EPP (Expanded Polypropylene) foam lining the shell. These combined features work together to protect your child's head and chest from incoming side-impact crash forces by distributing the forces over a larger surface area, helping shield your child from vehicle intrusion and contain your child's head and body in the seat.

Premium Fit and Comfort Features
Whether children are watching the world go by or snuggling in for a nap, they'll enjoy that the ROUNDABOUT 55 reclines in both the forward and rear positions. And thanks to additional features, which include high-density comfort foam and a plush cover set with a matching belly pad, they'll always ride in style and comfort. A 55-pound weight capacity, two buckle positions, and a tangle-free five-point harness with four harness-height settings ensure that your growing child will ride safely and comfortably. Plus, an optional Infant Positioning Insert (sold separately) allows you to properly and snugly fit smaller infants into the car seat.

Ease-of-Use for Safety and Convenience
Packed with perks for parents, the ROUNDABOUT 55 makes it easy to secure your child in the proper position without guesswork. Premium lower LATCH connectors make for a quick, simple, and tight installation, while the push-button allows you to easily uninstall the connectors. Easy-to-access built-in lock-offs allow you to install the car seat with ease using your vehicle's lap and shoulder belt.

Additionally, an anti-slip contoured base grips and protects the vehicle seat, ensuring a tight installation in all types of vehicles. Convenient holders keep harness straps out of the way when you're placing your child in the seat.

The BRITAX ROUNDABOUT 55 Convertible Car Seat is backed by a one-year limited warranty.

What's in the Box
One BRITAX ROUNDABOUT 55 Convertible Car Seat and manual.


Customer Reviews

Straps are easy to buckle/unbuckle and adjust easily.
JB Zimmerman
I like this car seat better than my 2009 Britax Boulevard which my son rides in in our van.
P. Fulton
It looks great, is very safe, and seems really comfortable for my daughter.
Nate Sahl

Most Helpful Customer Reviews

91 of 94 people found the following review helpful By mommylopez on November 25, 2011
Color Name: Davenport
We have had this carseat for a year now and are about to purchase a second one for our son. We put our daughter in it when she was almost 1 yo. I chose this because at the time I was driving a Honda Civic and it fit wonderfully (Rear facing and forward facing. We started her rear facing with the carseat reclined. Once she was 1 year and 20 lbs we turned her around.) Now we have a minivan but I still prefer this one to the larger/bulkier Marathon and Boulevard. A good friend has the later and now that her sons are older she is switching to a booster anyway. Here are the high points for me:

1) Easy to install! Some carseats take a rocket scientist to install but this one is fairly simply. We use the Latch option. One trick that helped me when I was installing it in our Civic was to snap side that is closest to the center of the car first, with the carseat turned in toward the center of the car. Then I turned the carseat to face forward and snapped in the other side. Then stuck my knee in the seat and used my body weight to press it down while tightening both sides. I'm tall and if I can get it into a Civic while being 6 months pregnant I think almost anyone can do this. It just takes a couple of minutes. Our minivan is much easier to get it into, because it has the latches exposed. My Honda had the latches hidden down between the seat with a small button to indicate where the latch bar was so it was kind of a guessing game, but that was really the car's fault, not the carseat.

2) Safety, safety, safety! (Which perhaps I should have mentioned first) I think it's pretty much accepted that Britax puts out great, quality products which have superior safety ratings. Like another reviewer said, check out their site for the rigorous safety testing they do.
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17 of 17 people found the following review helpful By P. Fulton on June 8, 2012
Color Name: Onyx
I absolutely LOVE this car seat & would HIGHLY recommend it to anyone! I got it because I've trusted the Britax brand for 3+ years (we have a 2009 Boulevard & Marathon) and I needed a high weight/height convertable seat for my big boy (12 months and 28.5lb & 32.5inches!) to use in both my husband's small Toyota Corolla and our sitter's Honda Pilot. My criteria for the purchase were ease of transfer between cars especially in the RF position, high weight/hight limit, significant head protection and reasonable price.

I am an ER nurse so I know what can happen to children in motor vehicle collisons and I have seen first hand how much safer RF is! So I intend to keep my baby RF until he is at least 2, longer if I can!

Anyway, back to the car seat. It is SO easy to transfer between cars due to the excellent LATCH on all Britax seats (allowing super easy tightening) and because this Roundabout is the lightest weight convertable Britax makes. It also is relatively short compared to other similar seats and fits nicely RF in the Corolla (thouth it is the same height as their Boulevard 70 & Marathon 70). The weight/height limits are exceptional on this seat (RF - 40lb/46in & FF - 55lb/46in). The size of the head protection is significantly larger compared to most car seats (other than ones with added head wings - Britax Boulevard/Frontier, Graco Nautilus) and is a HUGE improvement upon the Classic Roundabouts and Marathons.

My baby is very comfortable in this seat. He easily falls asleep in it.
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22 of 23 people found the following review helpful By Sarina on December 20, 2011
Color Name: Davenport Verified Purchase
We have had the car seat for about 2 months now and I very happy with same. It is sturdy and very comfortable because of the cushioning (some of the other car seats we were looking at were very firm).

What we love most is the size of same. We have a smaller car (mazda 3) and it fits perfectly. Not too bulky and easy toget our son in and out. We are still able to have 2 other passengers in the back seat.
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41 of 47 people found the following review helpful By J. Mccurdy on February 24, 2012
Color Name: Onyx
We got this Roundabout because my son outgrew his infant car seat. We have a Britax Marathon for my older daughter and I am completely impressed with it. I thought the only difference between the Roundabout and the Marathon was going to be the difference in weight limits. Boy was I wrong. The quality is not what I'd expect from Britax. It's hard to recline, all of that is a cheap plastic too, not like the hard plastic the Marathon has. Even the shoulder pads on the straps are cheaper, they velcro around the straps and fall off all the time. I'm just not impressed. Spend the extra $50 or so and get the Marathon, it's worth it.
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18 of 19 people found the following review helpful By Alexander The Pen on November 8, 2011
Color Name: Smokey Pearl Verified Purchase
The seat looks great, the pattern works well with all car interiors. Kids are easy to buckle in they look comfy and seem to enjoy the ride. We have several roundabout 50's and they are great seats, the new roundabout 55 design is even better. We really like Britax seats. It is our opinion that they are made to be strong, comfortable, safe and easy to install. Check out their website to see how rigorous and serious they are about their crash testing(kudos). Buying from Amazon is always top notch as well. Two great company's. You just can't go wrong.
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Most Recent Customer Reviews