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Britax Roundabout 55 - Onyx

The Britax Roundabout 55 achieves revolutionary head safety through the use of Britax SafeCell Technology in the base, integrated steel bars, and energy absorbing 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, offering a five-point harness, as well as multiple buckle and recline adjustments. A body pillow is provided for extra comfort and infant positioning.

Features:

  • Base with SafeCell Technology 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 with energy-absorbing EPP foam distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body
  • Premium Lower LATCH Connectors for a quick and simple installation featuring a push button for easy release
  • Certified for Aircraft Travel
  • Includes car seat base

Manufacturer Recommended Weight/Height Limits:

  • Rear Facing: 5 to 40 pounds
  • Forward Facing: 20 to 55 pounds
  • Up to 46 inches

Product Dimensions:

  • Width/Height/Depth: 18.5 x 26 x 21 inches
  • Weight: 17.6 pounds

Learn More: Visit the Britax shop! Click here. Please note that this feature may not be supported on mobile platforms.

• Made in the USA and Imported
• 100% Polyester

Product Notes

Popularity: #11 in Car Seats
View All Britax Roundabout 55 View All Britax View All Car Seats

Britax Roundabout 55-G3 - Onyx

438 reviews
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$158.54 SALE

List: $199.99

Description
Price
   
Britax Roundabout 55-G3 - Onyx
$158.54
Discontinued by vendor
Britax Roundabout 55-G3 - Gumdrop
$139.99 $199.99
Discontinued by vendor
Britax Roundabout 55-G3 - Isabella
$139.99 $199.99
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Britax Roundabout 55-G3 - Silverlake
$159.99
Discontinued by vendor
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REVIEW SNAPSHOT®

by PowerReviews
BritaxRoundabout 55 - Onyx
 
4.9

(based on 11 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Comfortable (10)
  • Durable (7)
  • Safe (7)
  • Easy to install (6)
  • Stylish (6)

Cons

  • Difficult to adjust (3)

Best Uses

  • Toddler (9)
  • Infants (3)
    • Reviewer Profile:
    • First time parent (6), Parent of two or more children (5)

Reviewed by 11 customers

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Displaying reviews 1-11

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(1 of 1 customers found this review helpful)

 
4.0

SO COMFY FOR BABY!

By Mandi

from Home, PA

About Me First Time Parent

Verified Buyer

Pros

  • Comfortable
  • Easy to install
  • Safe
  • Sturdy
  • Stylish

Cons

  • Difficult To Adjust

Best Uses

  • Infants
  • Toddlers

Comments about Roundabout 55 - Onyx:

My husband and I were in the market for a new seat due to the fact that our 9 mth old had outgrown his infant carrier. He's a big boy for his age! Of course it's still rear-facing but he loves it! He has plenty of leg room now. It sits up high enough for him to see out the window instead of just looking at the backseat. I feel very confident with our purchase. I know our little blessing is safe while riding in the car.

Comment on this review

(2 of 2 customers found this review helpful)

 
5.0

kept us safe

By liz

from omaha, NE

About Me Parent of Two or More Children

Pros

  • Comfortable
  • Safe
  • Sturdy

Cons

    Best Uses

    • Toddlers

    Comments about Roundabout 55 - Onyx:

    We were in a bad car accident (our little honda hit a huge suv taking a blind left) and our little two year old was in this car seat. It kept him safe. I realize it's only anecdotal evidence, but my husband and I are sold on Britax. We got the same one after the accident (since they say you must replace car seats after an accident even if there's no apparent damage to the car seat, just in case). We are very happy with everything about this car seat.

    Comment on this review

     
    5.0

    Britax

    By G

    from Fl

    About Me First Time Parent

    Verified Buyer

    Pros

    • Comfortable
    • Easy to Clean
    • Stylish

    Cons

    • Difficult to Set Up

    Best Uses

    • Infants
    • Toddlers

    Comments about Roundabout 55 - Onyx:

    Excellent

    Comment on this review

    (3 of 3 customers found this review helpful)

     
    5.0

    Good Quality and Comfortable

    By Eileen

    from San Jose, CA

    About Me First Time Parent

    Pros

    • Comfortable
    • Easy to Adjust
    • Easy to Clean
    • Easy to install
    • Lightweight

    Cons

      Best Uses

      • Toddlers

      Comments about Roundabout 55 - Onyx:

      I bought this carseat after doing a lot of research. I also own a infant carrier from Britax and knew I wanted to buy a convertible car seat from them also.

      One of the main reason why I bought this was because it fits in my small sedan car (Lexus IS250). My son has enough room for his legs and the carseat does not seem as bulky as the other ones I've seen. It is not too heavy, so it's easy to move and install in my husband's car when needed. My son loves being in this car seat and falls right a sleep with no problem.

      Comment on this review

      (1 of 1 customers found this review helpful)

       
      5.0

      Perfect Fit!

      By LaniDada

      from Concord, CA

      About Me First Time Parent

      Verified Buyer

      Pros

      • Comfortable
      • Easy to Adjust
      • Easy to install
      • Safe
      • Sturdy
      • Stylish

      Cons

        Best Uses

          Comments about Roundabout 55 - Onyx:

          I knew Britax was one of the top Brands for baby safety, and I did my research on all Brands. In the end, I chose Britax. I already have the Britax Marathon 70 (RF) for my car, and this purchase was for my Mother-n-law's car. Her car is a Ford Focus, which we all know is a bit small in the back; but the Britax Roundabout was a perfect fit. We love this carseat because of the recline features as well as the durability of the entire seat.

          Comment on this review

           
          5.0

          Truly perfect

          By Brian the dad

          from Biloxi Mississippi

          About Me Parent of Two or More Children

          See all my reviews

          Verified Buyer

          Pros

          • Comfortable
          • Safe
          • Sturdy
          • Stylish

          Cons

          • Difficult To Adjust

          Best Uses

          • Toddlers

          Comments about Roundabout 55 - Onyx:

          I now own 2 of these exact seats they are perfect and seem very safe. I also own a marathon and but it was a gift and is defiantly better but cost a good bit more. This seat fits my budget and is safe. Only down fall of it is moving it from car to car. That's why I bought 2.

          Comment on this review

          (2 of 2 customers found this review helpful)

           
          5.0

          Awesome Car seat!!!

          By JesseK

          from Eastern Ky

          About Me Parent of Two or More Children

          Verified Buyer

          Pros

          • Comfortable
          • Easy to Adjust
          • Easy to Clean
          • Easy to install
          • Lightweight
          • Safe
          • Sturdy
          • Stylish

          Cons

            Best Uses

            • Infants
            • Toddlers

            Comments about Roundabout 55 - Onyx:

            This car seat is amazing! Yes that's right I said amazing! It is so sturdy and so secure that it's unbelievable!! You can try to move it and if its installed in the vehicle properly it doesn't budge! I love it! My son loves it! Well worth the money! Also the size is excellent I have a 2013 Mazda cx5 which is a crossover not a small vehicle but its on the smaller side and this car seat fits excellent! I have tons more room in my back seat with it! Thank you thank you thank you!!! We love it!

            Comment on this review

            (1 of 1 customers found this review helpful)

             
            5.0

            Great seat

            By Brian the dad

            from Biloxi Mississippi

            About Me Parent of Two or More Children

            See all my reviews

            Pros

            • Comfortable
            • Easy to Clean
            • Safe
            • Sturdy
            • Stylish

            Cons

            • Difficult To Adjust
            • Hard to Install

            Best Uses

            • Toddlers

            Comments about Roundabout 55 - Onyx:

            I'm a dad that had to buy his own car seat ( My wife claimed the one my mom bought me for our son go figure). I bought this seat around 4 months ago and really like it. My mom bought us the marathon and we loved it also. I'm judging this seat against it which is bout 70 bucks more. This seat is really the way to go !!!! It very high quality but a pain in the real to move from vehicle to vehicle . So I just purchased my second to have in my truck ( we have 3 vehicles). Overall this seat is very safe and well built I can not overstate how great this seat is . Buy this one and keep your baby safe. Trust me it will.

            Comment on this review

             
            5.0

            LOVE IT!

            By F. Lopez

            from Fort Hood, TX

            About Me Parent of Two or More Children

            Verified Buyer

            Pros

            • Comfortable
            • Easy to install
            • Fits In Compact Car

            Cons

              Best Uses

              • Toddlers

              Comments about Roundabout 55 - Onyx:

              My car is rather small and I was looking for a seat that would fit well rear-facing. This one fits PERFECTLY! My son is also very comfortable and installation was a breeze!

              Comment on this review

               
              5.0

              great car seat

              By Ruby

              from san diego, CA

              About Me First Time Parent

              Verified Buyer

              Pros

              • Comfortable
              • Easy to Adjust
              • Easy to Clean
              • Easy to install
              • Safe
              • Sturdy

              Cons

              • Heavy

              Best Uses

              • Toddlers

              Comments about Roundabout 55 - Onyx:

              great car seat

              Comment on this review

              (1 of 3 customers found this review helpful)

               
              5.0

              Good Car Seat

              By MiniMini

              from Philadelphia

              About Me First Time Parent

              See all my reviews

              Verified Buyer

              Pros

                Cons

                  Best Uses

                    Comments about Roundabout 55 - Onyx:

                    I would recommend watching the Britax install video - you will probably pool noodles if you are installing refar acing.

                    Comment on this review

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