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Britax Roundabout 55 Convertible Car Seat - Onyx

 

It doesn’t have wheels, but the car seat is baby’s primary mode of transport (until she’s ready for her license that is!). So it needs to be comfortable enough for longer car rides, plus easy to install and transport for you. With the Roundabout 55, you get everything you need for in-the-car travels, out-of-the-car excursions and just about everything in between with features like rear and forward-facing recline, an anti-slip contoured base and a tangle-free, 5-point harness.
 
Why You’ll Love It: It holds up to 40 pounds rear-facing and up to 55 pounds forward-facing!
 
Features
  • “SafeCell” technology, designed to compress in a crash
  • Side impact protection
  • Tangle-free, 5-point harness
  • Rear and forward-facing recline
  • 2 buckle positions
  • Anti-slip, contoured base
  • Convenient harness holders
  • Patented energy-absorbing “Versa-Tether”
  • Integrated steel bars
  • Lower LATCH connectors
 
Age/Height/Weight Limits
  • Rear-facing: From 5 to 40 lbs.
  • Forward-facing:At least 1 year and 20 lbs.; up to 55lbs.
  • Standing height: Up to 46 in.
 
NOTE: The LATCH connectors for this car seat are stored under the cover near the back of the seat.

Product Notes

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Britax Roundabout 55 Convertible Car Seat - Onyx
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Discontinued by vendor
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REVIEW SNAPSHOT®

by PowerReviews
BritaxRoundabout 55 Car Seat - Onyx
 
4.6

(based on 20 reviews)

95%

of respondents would recommend this to a friend.

Pros

  • Comfortable (17)
  • Safe (17)
  • Stylish (17)
  • Durable (15)
  • Easy to install (14)

Cons

  • Difficult to adjust (3)

Best Uses

  • Toddler (15)
  • Infants (10)
  • Newborn (4)
    • Reviewer Profile:
    • Parent of two or more children (10), First time parent (5), Parent of multiples (twins etc) (3)

Reviewed by 20 customers

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Displaying reviews 1-15

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5.0

Great Deal

By Michelle

from Hunt Valley, MD

About Me Parent of Two or More Children

See all my reviews

Verified Buyer

Pros

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

Cons

    Best Uses

    • Toddlers

    Comments about Roundabout 55 Convertible Car Seat - Isabella:

    For the price of this carseat, it's wonderful - very safe and secure and comfortable for our almost 3 year old daughter.

    Comment on this review

     
    5.0

    Britax Safety at an Affordable Price!

    By 2BunnyPotPies

    from Boca Raton, FL

    About Me Parent of Multiples (Twins etc)

    See all my reviews

    Pros

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

    Cons

    • None

    Best Uses

    • Infants
    • Toddlers

    Comments about Roundabout 55 Car Seat - Onyx:

    These seats arrived quickly and diapers.com had a great price! We are a Britax family. We have Britax Advocate 70 CS's for our 15mo twins. But we were looking for a less bulky, less pricey spare set of carseats fo Grandma, airplane travel, etc. The Roundabout 55 fit the bill! The Roundabout is not as plush and cushy as the Advocate and it does not have the same "robust" side safety padding. However, both seats have the same easy installation and basic frame saftey features (i.e. steel reinforcements, tether to keep seat from flipping back/forth and under seat crumple zone). The Roundabout is less bulky, weighs less and costs less but still feels solid and safe. Importantly, the kids are comfy and happy as well. We are very pleased with these as spare carseats but they would be great primary car seats too!

    Comment on this review

     
    5.0

    Awesome car seat!

    By Devon B.

    from San Diego, CA

    See all my reviews

    Comments about Roundabout 55 Car Seat - Onyx:

    After doing a ton of research we knew that the Britax brand was what we wanted for our daughter. The safety reviews are fantastic and we haven't heard anything negative. I looked around for the best price and diapers.com beat out [@] and [@] We bought it at a 20% discount though so it may not have priced as well otherwise, I would do some research before buying since it's exensive. Definitely worth the money though!

    Comment on this review

     
    5.0

    awesome carseat

    By Sarah- Mommy of 2

    from Dallas TX

    About Me Parent of Two or More Children

    Pros

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

    Cons

      Best Uses

      • Infants
      • Newborn
      • Toddlers

      Comments about Roundabout 55 Convertible Car Seat - Isabella:

      I just purchased this for my 3 month old. Ive known ppl with britax carseats, and never understood what was so extraordinary about them. well, now I know! You could feel how sturdy they are, and the steel bars in the back make me feel so much better. I feel at ease knowing my child is in a safe carseat. My older child is in a Graco right now, not a bad seat, but definately not as safe or as nice as the britax. So I will now be purchasing a frontier for him! I ordered the roundabout because it was well within my budget and I found it meets all my expectations. Even though you have to re-harness it yourself, its not difficult at all, very easy actually. If I have any more kids, I will for sure be ordering strictly britax and probably skipping the infant carrier as the weight limit works with little babies (if you use a head support). All In all, awesome carseat thats actually affordable!

      Comment on this review

      (1 of 1 customers found this review helpful)

       
      5.0

      Baby loves it

      By Beth

      from NJ

      About Me First Time Parent

      See all my reviews

      Pros

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

      Cons

      • Bulky
      • Heavy

      Best Uses

      • Infants

      Comments about Roundabout 55 Car Seat - Onyx:

      I bought this for my 6 month old because she absolutely hated the carrier. She found this carseat to be more comfortable, as she did not cry everytime I put her in it. She even fell asleep in the carseat, which she never did before. She looks much more comfortable in it. The material is not hot and there is sufficient room to breathe. It seems like it may be a little too big for less than 6 months old or for babies that can not hold their necks/heads up yet. I guess you can buy a neck support for a smaller baby. Very happy with this purchase.

      Comment on this review

      (1 of 1 customers found this review helpful)

       
      5.0

      Love this carseat!

      By Didi333

      from Atlanta GA

      About Me First Time Parent

      Pros

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

      Cons

        Best Uses

        • Infants
        • Toddlers

        Comments about Roundabout 55 Convertible Car Seat - Isabella:

        This is a great carseat! It's very comfy and sturdy! The color is even better in person. My baby is so comfy and no more fussing on car rides! It was very easy to install. Mommytoaprincess, I saw the pic of your daughter in her carseat, and no wonder it was difficult to install! You are supposed to recline it in rear facing position! It should be at a 30 to 45 degree angle! No wonder it is uncomfortable! I hope you have since installed the seat properly....

        Comment on this review

        (1 of 1 customers found this review helpful)

         
        5.0

        Great Seat!

        By LT

        from Florida

        About Me Parent of Two or More Children

        See all my reviews

        Pros

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

        Cons

          Best Uses

          • Infants
          • Toddlers

          Comments about Roundabout 55 Car Seat - Onyx:

          I bought this carseat for my 10 month old who is pretty tall and right at 19 pounds. I've put him rear-facing and it fits nicely in my Honda Odyssey. It was super easy to install, and he doesn't mind sitting it at all. It has 3 levels, and I have him in the most reclined level, so he still falls asleep when we go on long trips. It is easy to adjust the straps to the different height-levels and using the latch couldn't be easier. I love my van and my new Britax carseat. I haven't tried to clean it yet, but the material is very nice quality. It is also very cushioney, so it seems comfortable, and very sturdy and safe. I compared the Roundabout and the Marathon, and decided to go with the Roundabout, because it cost less and the features it was lacking (compared to the marathon) I didn't find necessary.

          Comment on this review

           
          4.0

          love it

          By Jersug

          from Casper, Wyoming

          About Me Parent of Multiples (Twins etc)

          See all my reviews

          Verified Buyer

          Pros

          • Comfortable
          • Easy to Clean
          • Easy to install
          • Safe
          • Stylish

          Cons

          • Difficult To Adjust

          Best Uses

          • Toddlers

          Comments about Britax Roundabout 55 Car Seat - Onyx:

          As with my other comment,I did have trouble adjusting the recline after it is secured in the seat with the teether and all since I had to have 2 carseats at the same time I bought them alike other then fabric. I do notice that the insert fabric for their lumbar area does move around and get squished up but still not a big issue for me. This was a great purchase!

          Comment on this review

          (0 of 2 customers found this review helpful)

           
          4.0

          Love my car seat!

          By Abby

          from Vienna, VA

          About Me Parent of Multiples (Twins etc)

          See all my reviews

          Verified Buyer

          Pros

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

          Cons

          • Difficult To Adjust

          Best Uses

          • Toddlers

          Comments about Britax Roundabout 55 Car Seat - Onyx:

          Love this car seat - very cute and practical. The only downside in my opinion is that it's harder than my older car seat (same brand and model) to adjust the tightness, but I guess it makes it harder for the older kids to adjust themselves, so it's hard to find issue with that from a safety perspective.

          Comment on this review

           
          5.0

          Love Britax

          By Georgia Mom

          from Atlanta, GA

          About Me Parent of Two or More Children

          Verified Buyer

          Pros

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

          Cons

          • Heavy

          Best Uses

          • Infants
          • Toddlers

          Comments about Roundabout 55 Convertible Car Seat - Isabella:

          This is my 3rd Britax car seat purchase and I am very pleased. The pattern of this car seat is very stylish and it is extremely soft and wipes clean easily. I have 2 Boulevards and I like the fabric on this one better. My daughter is on the smaller side and she fits great on the lowest strap setting. She fell asleep on her first ride in too!

          The only issue we had is we are not able to use the tether rear facing in our minivan because there is no hook on the floor and to put it back over the seat on the headrest would make it quite difficult to get the baby in. Still fits secure without.

          Comment on this review

          (1 of 1 customers found this review helpful)

           
          5.0

          Prettier in person

          By Watied4ever

          from Chattanooga, TN

          About Me First Time Parent

          Pros

          • Comfortable
          • Easy to Clean
          • Extended rear facing
          • Safe
          • Sturdy
          • Stylish

          Cons

          • Could be simpler to insta

          Best Uses

          • Infants
          • Toddlers

          Comments about Roundabout 55 Convertible Car Seat - Isabella:

          We choose this as our next carseat our child is petite so this one will probably fit her until she can go to a booster, also it is a great price and quality car seat. We are able to rear face even at 21 months in both of our cars and one is an older model Honda Accord with a very small back seat. As for looks we got the "bella" seat and it looks way better in person than on line. We are very pleased with this seat.

          Comment on this review

           
          5.0

          I highly recommend!!!!

          By Renee

          from McConnellsburg pa

          About Me Parent of Two or More Children

          Verified Buyer

          Pros

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

          Cons

          • No cons

          Best Uses

          • Infants
          • Newborn
          • Preemies
          • Toddlers

          Comments about Roundabout 55 Convertible Car Seat - Isabella:

          I can not express enough about how much I love this carseat! I had brought another one before thus and hated it. It was hard to get in and out and never did fit rear-facing well. This one fits great in my car, isn't nearly as bulky and she looks comfortable in it. The tether straps are so easy. Just push them in til they click and then they have a release button to undo. My other had a hook on the end that was hard to get on and even harder to get off. The roundabout also has Velcro on the sides of the harness so u don't have to dig under your child for the straps. They stay placed on the sides. Haven't cleaned it yet so not sure how easy that will be. Has mire cushion then my other one. Hoping the pink doesn't get ugly quick. I would definitely recommend.

          Comment on this review

           
          5.0

          Great car seat

          By Vegas mama

          from Las Vegas, NV

          About Me Parent of Two or More Children

          See all my reviews

          Verified Buyer

          Pros

          • Comfortable
          • Easy to Adjust
          • Sturdy
          • Stylish

          Cons

          • Bulky

          Best Uses

          • Toddlers

          Comments about Roundabout 55 Convertible Car Seat - Isabella:

          I think it's a cute, safe seat. Super easy to put my baby in and out of. Straps don't get tangled. Wonderful value.

          Comment on this review

           
          4.0

          Great Choice!

          By Madeline's Mom

          from Memphis, TN

          About Me First Time Parent

          Verified Buyer

          Pros

          • Easy to install
          • Fits well in smaller SUV
          • Safe
          • Stylish

          Cons

            Best Uses

            • Toddlers

            Comments about Roundabout 55 Convertible Car Seat - Isabella:

            Super cute and the padding is much nicer than most convertible seats on the market. THe straps are not as easy to adjust as my other Britax. My 13 month old doesn't cry when we put her in this seat- she hated her infant seat.

            Comment on this review

            (1 of 1 customers found this review helpful)

             
            5.0

            I love this carseat! Seriously!

            By navymomof2

            from San Diego, CA

            About Me Parent of Two or More Children

            See all my reviews

            Verified Reviewer

            Pros

            • Comfortable
            • Easy to Adjust
            • Easy to Clean
            • Easy to install
            • Fits Nicely
            • Great material
            • Reclines well
            • Safe
            • Sturdy
            • Stylish

            Cons

              Best Uses

              • Infants
              • Newborn
              • Toddlers

              Comments about Roundabout 55 Convertible Car Seat - Isabella:

              This carseat is incredible! We bought an Alpha Omega seat for my son a few years back and were very disappointed with the fact that every time he fell asleep we would have to figure out a way to keep his head up. This seat not only reclines perfectly for my daughters head to not fall forward, but it also fits behind the passenger seat and still gives me plenty of leg room! The material is so soft, this velour type material, and it comes with this cute little belly pad that goes between the baby and the buckle. The straps are so easy to adjust, not like how I had to tug and pull on the other seats we've had. And it comes with so many straps for different options to secure the seat. We have it so secure in there it really can't compare to any other seat or carrier/base that we've owned. I really couldn't be any more satisfied with our purchase :)

              Comment on this review

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