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Britax Marathon ClickTight Convertible Car Seat - Rio

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Item # E1A386N


Rear-facing: 5-40 lbs
Forward-facing: 20-65 lbs
Height capacity: 49 inches
Dimensions (in): 18.5 W x 23.5 H x 23 D

What's Included: Car Seat Only


ClickTight Installation System

Easy, secure installation in 3 steps:
1: Turn the ClickTight Release
2: Thread and connect the vehicle seat belt
3: Click it closed!

Impact Absorbing Base

Compresses to absorb crash energy and counteract forward movement, keeping your child clear from the seat in front of them.

Side Impact Protection

Complete Side Impact Protection surrounds your child in a deep protective shell designed to absorb crash forces and shield your child from debris.

7-Position Recline

Adjusts for your child's comfort while ensuring the best installation angle for your vehicle.

The Marathon ClickTight Convertible Car Seat is an excellent choice for getting your family where they need to go safely, comfortably and with so much ease. With the ClickTight Installation System, now everyone can install the car seat securely and confidently by just buckling the seat belt. You simply open the front of the car seat, buckle the seat belt across the belt path and then click the seat shut for a proper installation every time. SafeCell Impact Protection surrounds your child in safety components that work together to protect well beyond the established federal safety standards. And Complete Side Impact Protection shields your little one in a deep protective shell designed to absorb crash forces and protect from debris.

A car seat works best when it provides the right fit so the Marathon ClickTight comes with the Quick-Adjust, 12-Postion Harness and 2-Position Buckle to keep up with your growing child. Plush Foam Padding provides premium comfort at every touch point and there are even 7 recline positions with an Automatic Level Indicator so you can adjust to ensure the best installation angle for your vehicle.

The Marathon ClickTight converts from a rear-facing position (for babies 5-40 lbs.) to a forward-facing position (for children 20-65 lbs.) and has been carefully designed to keep your child safe and you free from worry along the way. So click them in, give them a kiss and go with confidence.

Product Features

ClickTight Installation System ensures that everyone can install the car seat securely and confidently by just buckling the seat belt.

SafeCell Impact Protection is an integrated system of safety components that work together to protect your child well beyond the federal safety standards. Including an Impact Absorbing Base, Tether and Harness, an Impact Stabilizing Steel Frame, and Complete Side Impact Protection. SafeCell means your child is surrounded in best-in-class safety.

SafeCell Complete Side Impact Protection surrounds your child in a deep protective shell designed to absorb crash forces and shield your child from debris.

  • SafeCell Impact Absorbing Base compresses to absorb crash energy and counteract forward movement keeping your child clear from the seat in front of them.
  • SafeCell Impact Stabilizing Steel Frame gives you peace of mind knowing there is strength where you want it most, through the spine of the car seat reducing forward flex and at the connection points to the vehicle.
  • SafeCell Impact Absorbing Tether minimizes potential seat rotation with our unique two-strap design and slows forward movement with our patented rows of stitching that ?give-way? one at a time.
  • SafeCell Impact Absorbing Harness slows forward movement in the event of a crash.
  • 7-Position Recline with Automatic Level Indicator adjusts for your child?s comfort while ensuring the best installation angle for your vehicle.
  • Plush Foam Padding in the cover, buckle pad, shoulder pads and removable pillow surrounds your child in comfort at every touch point.
  • EZ-Buckle System keeps buckles and straps out of your way when placing your child in the car seat.
  • Easy-Remove Cover for cleaning convenience.
  • Quick-Adjust, 12-Position Harness and 2-Position Buckle allows you to easily move the harness upward and buckle outward for a comfortable, secure fit as your child grows.
  • Certified for Aircraft Travel
  • Made in the USA with global components

Complete Specifications:

  • Child Weight (lbs) Rear Facing: 5 - 40 , Forward Facing: 1 year and 20, up to 65
  • Child Standing Height (in) 49 or less
  • Child Seated Shoulder Height (in) 16.95 or less
  • Product Weight (lbs) 28.5
  • Product Dimensions (in) 18.5W x 23.5H x 23D
  • Seating Compartment Height (in) 23.75
  • Seat Area Depth / Width (in) 10.5 / 11.5
  • Shoulder Width (in) 16
  • Harness Slot Heights (in) 8.35 to 17.7 (.85" increments), 12 positions
  • Buckle Strap Depths (in) 5.25 / 7

279 Reviews
76% (213)
16% (44)
2% (6)
3% (7)
3% (9)
92% Recommend this product (257 of 279 responses)
By Drew
May 10, 2018
Amazing carseat!
This is a great carseat. My daughter loves it. It is soft and very secure!
By JConk
May 3, 2018
Comfortable, adjustable, perfect fit!
Britax is our preferred car seat. Their safety standards are excellent. So, we trust Britax. This was our first experience with a click-tight seat. It was VERY easy to install, less bulky, the padding was better and we LOVE the additional plastic storage pockets for extra straps.
Pros-easy to install -streamlined -padded -great strap storage -easy to adjust -nice color options
By Amber
Blue Ridge, Georgia
May 2, 2018
Great car seat!
Great car seat! Very safe and does not move at all!
By Emma
Montgomery, New York
April 25, 2018
My first Britax
This seat is amazing. If you plan on/need to move a seat from vehicle to Vehicle often then the Clicktight is so worth the price. The harness is also so easy to use and the design is very sleek. My daughter loves her britax. It is very compact front to back when rear facing a toddler, so this seat works well in smaller cars (once kiddo can sit unassisted).
ProsEase of install, no rethread harness, nice fabric, comfortable.
Best UsesSwitching between vehicles often
By Chris
San Antonio, TX
April 25, 2018
Excellent car seat
This is an excellent car seat. It took a little understanding at first on how to put the seat belt, But after a few mins it is a cinch!
By saracat
Sacramento, CA
April 22, 2018
Had one of these and one of a different brand
And that Clicktight concept is worth its weight in gold. No more wrestling in the back seat in the CA heat. Ended up replacing the other one just to not have to go through that again, now have 2 Britaxes! Only concern is hoping I can fit more in the seat with kid #2.
* This product review was collected by the manufacturer.
By Jess
Frenchtown, Montana
April 20, 2018
Cadillac of Car Seats!
My husband and I love this carseat. It is well padded and a comfortable fit for our 1 year old. He falls sleep all the time. Our infant carseat was a Britax as well. We feel much more at ease with the safety ratings! I also love how this carseat can stay rear facing for longer.
ProsComfortably cushioned, room to grow, high safety ratings, and easy to install and move out of car.
ConsSometimes the straps twist but overall I haven't found any other cons!
By Lindsey
Atlanta Georgia
April 18, 2018
Best carseat
We have had many car seats and this by far is the easiest to install. My son loves it and is so comfortable in it.
By Carl
Brooklyn, NY
April 14, 2018
Easy to use
We got this after reading lots of reviews and watching the Car Seat Lady‚€™s video. It‚€™s super easy to install and seems pretty comfortable for the baby.
By Christy
Alton, New Hampshire
April 11, 2018
Wonderful product
My daughter has always hated her car seat! When I unpacked this car seat I almost didnÔŅĹ€™t get to install it in my car, she just wanted to sit in it! Now she actually enjoys going in the car! I would record this seat to anyone and everyone who will listen! Best Buy Ever!!! Thank you Britax and Albee baby!
By mary
yuba city, ca
April 6, 2018
Britax Convertible Car Seat
I like the car seat. Very heavy, but for a good reason. Comfortable for my grand-daughter who is 16 months old. She is 32 inches tall, so she is still forward facing. Read the instructions for install pretty easy.
Prosnice comfortable seat. Love the Britax line have the Britax infant b-safe car seat and will be using that for the new baby coming soon.
Best UsesStay in the car car seat. Too heavy to move out.
April 6, 2018
Best purchase to relieve your insanity
It takes just a little more time to install but all worth it to ensure baby's security. I love the fact that it has extra sizes for your growing baby.
ProsA heavy duty car seat for best protection.
ConsNot stroller compatible.
By Britiany
Raleigh, North Carolina
March 4, 2018
Car Seat
I bought this car seat for my mom who keeps my 9 month old on a regular basis. It fits perfectly and we already love the seat!
By Mina
Las Vegas
March 2, 2018
Awesome transition
We bought two of them one for my car and other for my husband. We didn‚€™t want sacrifice safety for price. We got safety and price!!
By Yuchan
Charlotte, NC
February 22, 2018
Best price for the Safest Car Seat!
I spent a lot of time on looking for a good deal for Britax Marathon ClickThight. It has the best overall scores cross several baby car seat rankings. I was surprised to see such a low price + no tax. Highly recommend to parents who consider safety is no.1 when shopping for a car seat.
By Kelly
Sarasota, FL
February 15, 2018
Bought this car seat after much research
I read lots of reviews on convertible car seats before deciding on the Britax Marathon ClickTight. I love it! It is super easy to install. The great thing is once you click the seat in place during installation you know you have installed correctly. This is my fifth car seat I have purchased for grandchildren, and I think the best yet!
By Kelsey Brown
Temecula, California
February 6, 2018
This is a great car seat
We have the marathon, the boulevard, and the advocate and the marathon is my favorite. The boulevard doesn‚€™t have enough padding and is way too bouncy. The advocate has way too much padding, where we had to take some of the padding out because it was just too much. The marathon is right in the middle and it‚€™s perfect. It‚€™s comfortable for my daughter and she loves it. Plus it still has the click tight technology.
By Melissa
Kitty Hawk, NC
February 2, 2018
Easiest car seat to install, ever. Love this seat. This is the second one I‚€™ve bought from this company. They are awesome.
ProsEasy to install! Heavy, good for stabilizing Nice looking
By Janine
Dallas, TX
January 19, 2018
Great convertible car seat!
This is actually our second Britax Marathon ClickTight Convertible Car Seat. We wanted our second daughter to have the same color car seat as our first. We love the color, the quality and it's very easy to keep clean. I highly recommend this car seat!
By Ruthiemomof4
Denver, CO
January 15, 2018
Great carseat
We have owned several Britax carseats. Our first set of seats has expired from our older children (so annoying) so we needed to purchase more for our 1 year old twins. These fit easily side by side, rear facing. It is easy to adjust the straps which is important in the winter when your layers can add extra bulk. The fabric is soft and I like the extra cushion they added under the bum. The click tight option is awesome. It is easy to use and makes install less of a hassle. We don't have to move these often, but it will be easy when we do. All in all, very satisfied with this purchase.
By Stephanie
January 7, 2018
Great seat
Love this seat. The click tight feature makes installing the seat quick.
By B Martinez
San Diego, CA, United States
December 23, 2017
Not a good seat for a 2012 Honda Odyssey
I bought this car seat believing it would be a great improvement from the babyseat. Unfortunately we tried to install it in the middle seat of a 2012 Honda Odyssey and not mater what we did even followed a video instruction from Britax the seat would move. We will be returning his car seat and hope we find one that is an easier install for a Honda Odyssey.
* This product review was collected by the manufacturer.
By Terri
Charlotte, NC
December 15, 2017
Easy to install
I purchased this car seat for the times I have my grandkids. I opened the box, pulled out the car seat and had it installed and secured within 5 minutes. One grandchild is forward facing and one is backward facing. It‚€™s very easy to adjust to accommodate either child.
By Momof5
Los Angeles,Ca
December 10, 2017
My go to car seat
Have always had britax for all my kids. Click tight feature makes it easy to put in the car. Thanks to Albee for the great price.
By Nikki
December 10, 2017
Love this seat!
We already have a britax click right marathon and love it, so when we needed to get a carseat for our second car, we decided to get the same exact one. We love this seat because its easy to install, has a no rethread harness, and is very safe. We are britax customers for life!
By arthritic grandma
Indianapolis, IN, United States
December 9, 2017
You need young strong hands!!!
I bought this car seat to use for my granddaughter.. The appeal was the "ease" of installation. Seems I still had to sit in it and struggle to get a tight installation. My granddaughter just turned 3 and I need to raise the height--also a major factor in purchasing this seat. Well, the back will still raise but the straps are not long enough to accommodate the height. I cannot believe how short the straps must be--the troubleshooting guide says I should contact customer service about this problem. So right now I am very unhappy with this seat. I tried to open the seat to see if the straps were somehow caught somewhere but my 64 year old hands can't turn the release.
* This product review was collected by the manufacturer.
By Laura782
Brooklyn, NY, United States
December 9, 2017
So far so good!
We bought one of these after having a cheaper travel convertible seat in our car for a while. This is SO easy to install with confidence, and our daughter seems really comfortable in it. I like that the seatbelt install is so straightforward, because it means we can install her seat in the middle, which is more convenient for us and safer for her.
* This product review was collected by the manufacturer.
By pjbailey
Grand Forks, ND, United States
November 17, 2017
We love Britax. This is our third Britax car seat. my youngest is outgrowing his infant car seat so we decided to transition him to the Marathon CT. He is is under two so we installed the car seat to be rear face. He really loves it. He looks really comfortable. My only complaint about this car seat is that is very heavy. Which is only an issue if you travel as often as we do. Besides that Britax car seats are fantastic.
* This product review was collected by the manufacturer.
By Erica
Birmingham, AL
November 13, 2017
Great Car Seat
I feel good putting my son in it because it got great safety ratings. Easy to install. Seems to be super comfy. No complaints!
By Tracy
November 6, 2017
Great carseat
Comfy and not hot
By Abe
Detroit Lakes, MN
September 20, 2017
Love this carseat
Easy to install and move between vehicles. Our daughter is comfortable in this carseat and doesn't fight like she used to in her old one. We will definitely recommend this convertible car seat to other parents we know.
By Courtney
Wynne, Arkansas
September 16, 2017
Love this seat
This easy install withthe clicktight feature is definitely worth paying for!
By V
Visalia, ca
August 16, 2017
Great Product!
We bought this car seat for my son a few years ago and loved it so we bought it again for my daughter. We really love these car seats. They hold up very well and the kids are very comfortable in them. My son is now 4 years old and he still fits in it great and still has plenty of room to grow. My daughter is 8 months old and she seems to like it. She sits and sleeps well in it. We are very glad we purchased this car seat.
ProsThis car seat is perfect for growing with the child. We love that part of the car seat.
ConsThe click tight is a little difficult to use. I have to have my husband close it for me. The seat belt also can get in the way when I am putting my daughter into the seat. But other than that it is a great safe car seat.
By happyhousner
New York, NY
July 14, 2017
Cowmooflage love
This is my second ClickTight Convertible Car Seat in Cowmooflage‚€”love this print! Between my car and my husband's we now have 4 ClickTight seats and love them. They are very easy to install and comfortable for the kids. They do take up a bit of room when rear-facing, but that's true of any car seat. Just wish they were a little easier to clean.
By julia
Kalispell , MT
July 13, 2017
I had my doubts about the clicktight method, but it has proven to be very secure
By Roxann
May 21, 2017
Best Deal!
Great price for a highly rated car seat.
By Paige
May 11, 2017
Fast service
I placed the order one evening, and it shipped the next morning. It arrived on time. The service exceeded my expectations. We are really happy with the Britax car seat.
By Carp
Springfield, MA
March 4, 2017
Good seat
I do like this seat, it is sturdy, however a bit difficult to adjust straps due to click tight feature. However, our guy is comfortable and loves it.
By S
February 24, 2017
So easy to install
I have 19 month old twins that are rear facing. I installed with the seatbelt and it was so easy!It was a breeze to installook! I highly recommend this seat! Only complaint is the straps do seem a little short compared to maxi cosi pria 70. Both my boys love the seat and go right to sleep!
ProsEASY Installation
ConsShort strap No cup holder
By Krisserlee
East Hanover, NJ 07936, United States
January 18, 2017
Love my clicktight
Love this car seat. It is so easy to install. It is heavy but it is reinforced with steel bars so I'd take the weight for safety. Very comfy my daughter loves it.
* This product review was collected by the manufacturer.
By Stephanie Thompson
Columbus, Ohio
December 21, 2016
A solid choice
Our new Marathon ClickTight convertible car seat is a solid choice. It's pretty easy to install as long as you don't need to take it out. I found the round click tight button that releases the seat very difficult to open once you get it in the car. Also, it was tricky put in my husband's car because of the way the seatbelt kept retracting. One other problem that's somewhat annoying is getting the straps to release, because the button to press is in a hole that you have to put your finger way down into. On the plus side, it has high safety ratings and is a beautiful car seat and very comfortable I believe for our little guy.
ProsHigh safety ratings.
ConsHard to take out once you install.
Best UsesCan fit in a smaller car like a Jetta.
By Thomas
December 14, 2016
Great car seat
Great car seat for the price. Very sturdy, easy to install, heavy, but not to heavy that it's a hassle to move from car to car. We bought for grandparents car and travel because our foonf was to heavy.
By monicah2007
Houston, TX, United States
December 14, 2016
Not Easy!
This car seat took me forever to install. I needed my husband's help to get it installed properly. The straps will not loosen. I am going to probably return it for a different car seat.
* This product review was collected by the manufacturer.
By Koka
December 4, 2016
Solid quality car seat!!! Heavy, which proves that its good quality!!! Very easy to use/install and the baby loves it!!! We all love it!!!! Would definitely recommend it.
By Erinhuey3
Houston, TX, United States
November 28, 2016
Very disappointed...
I am a FTM and I did a lot of research before buying a convertible car seat for our little girl. Every review was great for this car seat, safest, most comfortable, and easy to use. So I chose this car seat for my car and my husband chose the Recaro convertible car seat for his car. I definitely chose wrong. This car seat is very difficult to use, my kiddo is not comfortable and it is very obnoxious to use. My 2 year old is big for her age but the car seat is meant to be used for kids up to 50 lbs, when my little girl was 24lbs she honestly didn't fit in this car seat. The straps do not loosen at all and constantly get stuck behind the car seat. The recaro my husband got it so easy to use and my daughter actually says that she would rather ride in daddy's car. I was hoping for my daughter to be in this car seat for a very long time since it is up to 50lbs but I am already looking into another car seat because I am so unhappy with this product.
* This product review was collected by the manufacturer.
By Edlsgal
Erie, CO
November 26, 2016
Pain in the butt!
I've had my ClickTight for a year now an I am not happy with it. The thing is a tank. You cannot remove it with a child in it so you always have to wake up a sleeping child. It is a pain to install. If you don't have the tension of the seatbelt just right you can't close it or its too loose. You have to move it to adjust the incline so it is a guessing game based on the slope of the seat. The straps don't loosen very much so it can be irritating trying to get the child in and out while holding a toy. The padding comes off the plastic sides if you lean on it and it is a pain to reattach it.
* This product review was collected by the manufacturer.
By Robin Beesemyer
Reno NV
November 23, 2016
Safe and Easy...
As Grandparents, we need these to be safe and install easily and this model does this...
By AlisonVan
Carlisle, PA, United States
November 21, 2016
Love this Car Seat
I bought this car seat about 3 weeks ago for my 1 year old. It is sturdy and sleek in design. I love the clicktight feature! I have a Toyota corolla and I expected the fit to be snug. Surprisingly, there is more room than I imagined there would be. The straps are easy to use and operate. I did have to adjust the buckle on the bottom and after that adjustment, everything has been fabulous. I plan on buying another one for my husband's car!
* This product review was collected by the manufacturer.
By Gwen
November 2, 2016
Great car seat
This is the 2nd one I brought for my 2nd baby. It's a great car seat and very convenient to unbuckle the seat belt.
By Slgrimmer
Lake Havasu City, AZ, United States
October 24, 2016
Hate Installing
I have had this car seat for 11 month now and I hate it! It is so hard to install with the latch system. I have a very difficult time turning the clicktight button to get the seat to open up. We struggle with it every time. It's very hard to turn, and then it's also hard to get it to latch again once you are done installing. Right now I have to wait for my husband to get off work to see if he can turn it so I can wash the pads after a blow out. (All pads are also hand wash and air dry so it's not a fast or easy process either) The hooks for the latch system are also very basic. The regular marathon which has hooks with a release button are so much easier to use. Yes this car seat keeps my daughter safe. Yes I have read all the information on how to correctly install it. She is safe when in the carseat. But man do I dread having to ever take it out of the car ( It is also very heavy) I am really considering trying to sell it and just getting a regular Marathon like her cousins.
* This product review was collected by the manufacturer.

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