2019 Britax Marathon CT Convertible Carseat Review
ClickTight isn’t a new-new technology anymore, since it was introduced on the Frontier and Pinnacle combination seats almost 5 years ago, but what *is* new is how it’s being applied to Britax’s convertible carseats. Britax has taken ClickTight and made it so that it takes seconds to install a ClickTight convertible seat. The new Britax Marathon CT is a Euro-styled, well-padded carseat designed to fit newborns to preschoolers.
Here’s a quick overview of the differences between the three new ClickTight convertibles. All Britax CT convertibles have the ClickTight Installation System, an impact-absorbing base with 7 recline positions, rip-stitch energy-absorbing tether, HUGS harness pads, a steel reinforced frame, EPP foam, and other side-impact protection features.
- Britax Marathon ClickTight – This model has a no-rethread harness, EPP-backed headwings, and standard rubber HUGS pads. MSRP $279.99/$309.99 with anti-rebound bar
- Britax Boulevard ClickTight – All the features of the Marathon CT plus SafeCell HUGS pads; deeper, plastic-surrounded headwings; “Click & Safe” snug harness indicator. Read our Boulevard ClickTight Review here. MSRP $299.99/$329 with anti-rebound bar
- Britax Advocate ClickTight – All the features of the Boulevard CT plus external side-impact cushions. MSRP $349.99/$379.99 with anti-rebound bar
Britax also markets a less expensive series of smaller convertibles. We also reviewed the Britax Emblem that sells for $199.99 at Amazon.
Weight and Height Limits:
- Rear-facing 5-40 lbs. AND child’s head is 1” below top of head rest
- Forward-facing 20-65 lbs., 49″ or less, at least 1 year old*
*Britax recommends that children ride rear-facing to the highest weight or height specified
Marathon CT Overview:
- ClickTight installation system (also acts as a built-in lockoff device)
- Complete Side Impact Protection – deep protective shell
- 12 position headrest with no-rethread harness
- 2 crotch strap/buckle positions
- 2 position buckle with EZ-Buckle System to keep buckle to the front and forward of the child when loading
- Steel reinforced frame
- SafeCell impact-absorbing base – these cells compress in a crash, which lowers the center of gravity of the child and reduces forward head excursion
- Energy-absorbing, rip-stitch Versa-Tether®
- 7 recline positions to help achieve a proper recline angle in any vehicle
- Smooth bottom base with grippy edges that won’t damage vehicle upholstery
- FAA-approved for use on aircraft
- 10 yr lifespan makes it a good value; sells for under $280 at Amazon
- Made in the USA!
Marathon CT Measurements
Harness slots: 7 ½”-18 ½”
External widest point: 17 ½”
Shell height with headrest: 27”
Shoulder width: 14”
Crotch strap depth: 5”, 7”
Seat depth: 12”
Seat weight: 28 lbs.
Installation
No lockoffs! What? I am celebrating no lockoffs from the brand that introduced lockoffs to the American public? Yep. It actually has the ultimate seat belt lockoff in the ClickTight panel, which closes down on top of seat belt, locking it. The panel unlocks by pushing the dimple at the top of the CT dial and turning it clockwise.
Recline: There are 7 recline positions for rear-facing and as long as you stay within the proper zone for either your rear-facer or forward-facer, you’re golden. I wish there were one more for my 2011 MDX, but I could have used a noodle to get there. I don’t have a steep back seat, but I was 1 recline position away from being where I think a newborn should be. The Marathon can be adjusted as upright as you want for rear-facing as long as the level indicator ball isn’t touching the edge, which is fantastic for those older kids who don’t sleep, and it gives front seat passengers more legroom. For forward-facing, the MA provides a nice recline as long as you stay within the indicator’s forward-facing zone AND the base isn’t pushed more than 3” off the vehicle seat. This recline is nice for kids who have special needs or if you’ll be traveling on a long trip overnight, but it really cuts down on the child’s legroom if you put it at the most reclined. Leg injuries are quite common in forward-facing children because their legs get smashed into the front seat in a crash, so put the seat as upright as possible for your child.
Seat Belt: Installation with the seat belt is easy peasy. Probably the most difficult part for me was threading the seat belt through the slots and into the belt path because the cover has so much padding that it impeded the belt going in. So I had to wiggle the belt a bit—it’s better than my hand not fitting in the belt path, getting permanent scars from scratches and skin scraped off my hand, fighting with lockoffs that don’t want to stay closed, and so on, that I’ve dealt with on other seats. Simply pull the slack out of the lap belt, make sure the seat belts are laying flat, and close the ClickTight panel. If the MA moves more than 1 inch, remove more slack from the seat belt. If it takes you more than a minute to do this process, there’s something wrong. But I’ll cut you some slack if it’s the first time you’re installing the seat 😉 .
LATCH: Britax almost scoffs at LATCH with the CT system, especially in these convertibles. Gone are the deluxe push-on style lower connectors with which Britax has spoiled us and in their place are standard clip-on style connectors, just like what’s found on the end of the tether strap. Huh. They’ve done this for 2 reasons: 1. to save storage space and weight on the seat, and 2. to discourage the use of the lower connectors. With the new LATCH regulations that have gone into effect, lower anchor weight limits have been drastically lowered on some carseats (heavy ones, like Britax seats) and since it’s so incredibly easy to install the CT carseats using the seat belt, it makes sense to discourage the use of the lower LATCH connectors. Of course, there are always times where you might want to use those connectors—when you have a passenger who might click open the seat belt and uninstall the carseat—is one instance that immediately comes to mind. The lower LATCH connectors are stored tidily in a small compartment on the back of the base.
But does the switch to the clip-on style LATCH connectors make installation with LATCH difficult? Heck no! Many of us have experience with the clip-on style lower connectors because they came on our rear-facing only infant seats, so it’s not new technology. Just clip on, making sure to always put the LATCH belt through the child’s left side of the seat, pull the slack out of the belt, and close the ClickTight panel, just like when utilizing a seat belt install. However, uninstalling the seat after using LATCH has proved to be a challenge sometimes. *Always* open the ClickTight panel first before trying to loosen the LATCH strap. If your circumstances permit, always use the seat belt for installation over using the lower LATCH strap. It’ll be easier in the long run.
Rear-facing LATCH weight limit: 35 lbs.
Forward-facing LATCH weight limit: 40 lbs.
Center LATCH installations with Non-Standard Spacing:
Britax only allows lower LATCH connector installation of their ClickTight convertible models in the center seating position when the vehicle manufacturer has designated it as a LATCH location.
Inflatable Seat Belts
Britax has determined that the Marathon ClickTight cannot be installed with inflatable seat belts found in some Ford, Lincoln, and Mercedes vehicles, and in some airplane seat belts.
Tether*
The tether on the ClickTight models has been shortened significantly. If you’ve had a Britax convertible or combination seat before, you know that the tethers on these seats have been so long as to be able to fit in the car behind you—in fact, people have run over the excess tether webbing that accidentally fell out a door. I found the new MA tether to be just long enough for me to tether rear-facing in my 2011 Acura MDX and have a little left over. I had plenty of tether length for tethering forward-facing to my seat backs.
Because it has been shortened so much, Britax offers tether extenders in case you need them in your vehicle. When you call customer service, 1-888-427-4829, with your date of manufacture and model number, you will be asked if you want a rear-facing extender or forward-facing extender. The rear-facing extender is 3” shorter than the forward-facing extender—16 ½” vs. 19 ½”. If you’d like information about tethering rear-facing*, we’ve got a blog written all about how to do it.
The most popular style of rear-facing tethering is Swedish style and Britax includes a tether connector strap for creating a tether point to set this up. We can’t really call this a D-ring anymore because this strap is all webbing now; there’s no more D-ring attached to one end. To be honest, I nearly threw the thing across the street in frustration trying to attach the tether hook to it until I followed Jennie’s advice (from her Boulevard CT review) of folding the loop into thirds and then clipping the hook on. Worked like a charm—thanks, Jennie!
*UPDATE: Britax changed their stance in 2015 and rear-facing tethering is no longer an option with their new convertible carseats. Now an anti-rebound bar is available as an accessory which serves the same purpose and function as a RF tether.
Fit to Child
The Marathon CT comes with an infant insert, which puts the lowest harness position at about 7.5”. Fit to Romeo, my 20” newborn doll was good and made even better by taking off the standard rubber HUGS pads, which are optional rear-facing, but mandatory forward-facing. Because the back of the MA is entirely closed, threading the harness ends back through to the metal splitter plate after removing the HUGS may seem tricky, but it really wasn’t. There’s a metal tube visible through the harness slots in the front that the harness is fed over from the front. A different tube is visible from the small opening on the back of the seat. Simply feed the harness over both tubes; the harness will come out the back of the seat to grab and you’re ready to reattach it to the splitter plate.
The infant insert, called the “comfort pillow” in the manual, is nicely designed to fit under the tuck in the back pad when it’s in the lowest position. There are no weight or height limits on its use, but I would remove it as soon as the child no longer needs it for a boost to the bottom harness slots. A very common sight we see at checkup events is kids crammed into carseats that are seemingly too small because they still have infant inserts in them. Once the inserts are removed, the children are much more comfortable and have more room to grow in their carseats.
Older children will find the MA very comfy too. My models, ages 4 and 5, loved the seat and said it was very padded. My 5 year old model sat comfortably rear-facing in the MA for about 15 minutes while waiting for me.
Quinn is 4 and weighs 44 lbs.
Addie is 4 and weighs 43 lbs.
Ava is 5 and weighs 38 lbs.
Update: If you open your ClickTight panel and see a metal plate at the buckle slot instead of the white plastic plate, your crotch strap is longer. This was a running structural design change Britax made in August 2017 and buckles are not interchangeable.
Cover/Maintenance/Ease of Use
The cover is in 4 pieces so you can pick and choose which part to wash, and is easy to remove and put back on. There are relatively few elastics to hold it on and the hard part is remembering to tuck it in all the way around, though a couple of the elastics that hold the front edge piece on are tricky to get attached. There’s no need to remove the harness (yay!) to take off the back portion for cleaning. Most important to remember is to tuck in the side cover where the CT panel locking mechanism can catch. There are red tabs and even warnings on the panel itself about tucking in the cover.
Instructions for cleaning the cover are to hand wash with mild soap and water and to line dry. The cover is very padded and I suggest rolling it tightly in an absorbent towel to get the extra wet out before hanging to dry.
Also different is where to find the date of manufacture (DOM) and model number sticker. Britax has long had the sticker on the top outside of the shell next to the child’s left ear, but it’s moved to the front of the CT panel, under the cover. You’ll want to know where this is because if you contact Britax with a question, they’ll ask you the DOM and model number.
FAA-Approval/Lifespan/Crash Guidelines
The Marathon CT is FAA-approved; however, because of the unique belt path and the different seat belts airplanes use, installation is altered. For rear-facing, keep the ClickTight panel closed and run the airplane seat belt over the top of the cover in the rear-facing belt path. Pull tight. For forward-facing, keep the ClickTight panel closed and run the airplane seat belt under the cover (pull the seat pad back forward) before placing the seat belt in the forward-facing belt path and tightening. Think about it: this keeps the bulky latchplate from being directly on your child’s back.
The Marathon CT has a lifespan of 10 years and Britax follows NHTSA’s crash guidelines of replacing after a major crash only.
ClickTight Troubleshooting
I thought I’d include a troubleshooting section specific to ClickTight carseats. Because they’re different than the average carseat in installation, different situations may pop up that leave you scratching your head.
Stuck CT panel: There’s probably too much tension on the seat belt/LATCH belt or the cover didn’t get tucked in behind the red tabs.
- Unbuckle the seat belt, then turn the CT dial.
- Try pressing down on the CT panel as you turn the CT dial.
- Don’t install the seat so tightly. Hopefully you’ve read this *before* installing your CT carseat! You can feel the tension on the seat belt/LATCH belt as you’re closing the CT panel and if it feels like you’re going to have to use your weight to get it closed, the belt is too tight. Loosen up a bit.
- Try to gently press the cover down on the sides as you lift the CT panel up, then tuck cover in behind red tabs. You’ll probably need 3 hands for this.
Harness different lengths: There can be multiple reasons for this problem.
- The harness is attached to the CT panel in its shortened length on one side and its long length on the other side. Take the harness off one anchor and match it to the other side.
- The harness got caught in the CT panel on installation. Open the CT panel, and while making sure the harness is out of the way, close it again.
- The harness is loosened all the way and somehow twisted behind the seat. Raise the headrest all the up and pull the harness tight. Then slowly lower the headrest back into position, pulling the harness tight as you lower the headrest.
- The harness loop ends weren’t placed back on the splitter plate/yoke in the correct order. The left harness strap loop must be nested inside the right harness loop. See the manual under the “Replacing the Impact Absorbing Chest Pads” section.
Advantages
- Better than average height and weight limits for rear-facing
- Super easy seat belt installation with ClickTight System
- ClickTight also acts as a built-in lockoff device so you don’t need to understand the pre-crash locking features of your vehicle seatbelt
- No re-thread harness makes it easy to adjust the harness height when your child has a growth spurt or when you need the seat for another kid
- Harness straps are thick and not prone to twisting
- EZ-Buckle System keeps belly pad and buckle out of the way when loading child in the seat
- IMMI buckle is easy to buckle and unbuckle
- Rip-stitch tether, HUGS pads, and impact-absorbing technology in base all work together to absorb energy in a crash
- Harness straps are replaceable, if necessary
- HUGS pads may be removed when the child is rear-facing (but they are required for forward-facing)
- Ability to tether in the rear-facing position*
- Range of rear-facing recline angles allowed
- Doesn’t take up a lot of room rear-facing if installed more upright for an older baby or toddler. This makes it a good option for smaller cars and for tall parents who may need to have the front seat all or most of the way back.
- Easy to remove cover
- Premium fabrics and extra padding for comfort
- Made in the USA!
Disadvantages
- Lack of EPP foam lining sides of seat
- Limited rear-facing leg room for older children near the upper limits of the seat
- LATCH compartment door won’t stay closed once opened
- Newborn recline angle may be difficult to achieve in some vehicles without a pool noodle
Conclusion
Despite not having the more robust headwings that the Boulevard CT and Advocate CT models have, two models that we include on our Recommended Carseats list, the Britax Marathon CT shouldn’t be discounted in the winning lineup Britax has with the ClickTight technology. The ClickTight panel makes installation a breeze; as long as you thread the belt through the correct belt path, the carseat practically installs itself. Does the ClickTight system live up to the Game Changer hype promised when it was released last fall? Yah-huh, you betcha!
* Editor’s Update: Rear-facing tethering no longer permitted for ClickTight covertibles made on or after January 28, 2015.
Thank you to Britax for providing the Marathon ClickTight used for this review. No other compensation was provided. All opinions expressed are those of CarseatBlog.
Updated May 2019
We have a marathon click tight. For rear facing it says height is good up until the child is 1 in below top of the headrest. I am unsure if they mean the outer shell or the headrest when it is all the way raised. Can you clarify? Thanks.
Hello,
I must be missing something because I have installed the seat and yet to use it because of a few reasons and even consider returning it. My daughter is 10 months old and even though the tilt level seems to be where it should for her age, the piece to pull to tighten the harness on her is tucked down below up against the back of the seat and I cannot reach it. I guess from reading this review we should be using the seatbelt and not the clips like I was doing. They were extremely hard to tighten but the seat belt seems like it gets in the way when I try to put my daughter in. Any help is appreciated! I have it ready to return but with all of the wonderful reviews I figure I will try again!
Hi Mary. You don’t *have* to use the seat belt, but it’s highly recommended just because parents tend to over-tighten the LATCH strap which, in turn, can make it *extremely* difficult to get the ClickTight panel open to uninstall the seat. Plus, LATCH has a low weight limit, even RF.
The more upright the carseat is, the more the harness adjuster strap will be hidden in the vehicle seatback. You said it’s completely hidden right now? You’ll just have to open the ClickTight panel to loosen up the install, pull it up, then close the ClickTight panel again. HTH!
I’m having difficulty seeing how to fit my 13 month old into the Marathon CT but it must be possible since you have photos of much larger children. I find the harness yoke does not allow enough space to get my son’s arms through and it is impossible to do up the buckle at the crotch if I manage to cram his arms in. According to the instructions I’m not to adjust the hip strap until 2 years old. Any suggestions?
Hi Kathleen. I have to ask the obvious–are you sure you’re loosening the harness all the way? Second, how is your son dressed when you’re putting him in the seat? Is he in heavy clothes or a t-shirt and pants? How long have you had the carseat?
He is dressed in a sweatshirt but I live in Canada where it’s winter 1/2 the year so taking off a coat does not make sense. The harness yoke in the back won’t allow the straps to come out any further so I assume they are all the way out. We purchased the seat about a month ago and it’s just collecting dust in tbe garage.
I thought in the Marathon clicktight manual it said that you are not to utilize the tether when the seat is installed rear facing? Thanks. Yes, I just re-read the manual of the Marathon clicktight and it definitely says not to use the tether strap in the rear facing installation.
Hi Laura- that is correct for newer seats. We will update our review to clarify the change, thanks for bringing this to our attention!
https://carseatblog.com/32084/britax-phasing-out-rear-facing-tethers-on-convertible-carseats/
Is the marathon clicktight the only one with the short buckle? I didn’t realize just how short it was til I tried to put my 15m old in it, and she’s actually pretty small.
Abby, no, all the ClickTight models have the short crotch strap.
Hi Heather,
Do you know if the crotch straps are longer on the non ClickTight models?
Yes, Sophie, the non-ClickTight models have longer crotch straps.
How does the Marathon ClickTight compare to the previous version of the Marathon in terms of front passenger legroom? We tried a neighbors Marathon in our compact car and it fit great and seemed to allow for good legroom. Will the ClickTight version provide similar results?
Thanks!
Hi Kristen. The Marathon CT should give you more room, especially for older kiddos because it has more recline options.
Thank you so much for the quick response:)
I just purchased the Marathon for my 11 month old son as he seemed too big for his infant seat – the Cybex Aton Q. Am I crazy or is this seat simply the same as an infant seat but slightly larger? I was hoping a convertible seat would make my son higher up so that he could see out the window and have a little more freedom to move his arms and legs (while still strapped on tight, secure and safely). He still seems crammed and claustrophobic and he’s not a big boy. He hates being in the car so I was hoping for a better experience for him from the Britax which I heard such wonderful things about !
Hi Lindsay. Some convertibles will sit higher on their bases than others, but that will also make it more difficult to get the child into the carseat. As you can see in the pics of the 4 and 5 yr olds above who are still rear-facing in this carseat, it’s definitely a large enough seat to hold bigger kids. Did you remove the infant pad? It’s optional and could contribute to that “stuffed-in” feel. You can also adjust the recline of the seat so that it’s more upright. What’s great about the ClickTight seats is that you can adjust them as upright as your son can comfortably sleep, as opposed to having it be at a particular recline level.
Hello, we have just purchased Britax Advocate seats for my car, a Hyundai Elantra and my husband’s car, a Subaru Outback. The Advocate fits great in our cars and our 1o month old likes it. We went to install the Advocate in my parents’ Mazda CR5 SUV and Mazda 6 Sedan and found that in these cars, installing the seat in the middle blocks both side passenger seat belts. I am wondering if the base of the Marathon is narrower than the base of the Advocate? Also, is our 10 month old who can pull to standing, sit and crawl okay with the recline in the dark blue zone? I am not sure what the distinction is between those zones. Thanks for any help!
Hi Felicity. So sorry I missed your comment!
The Marathon ClickTight has the same base as the Advocate CT. If you’re comparing the Marathon G4.1 to the ClickTight, I think the bases are about even in size (see https://carseatblog.com/29670/2015-britax-g4-1-convertibles-and-clicktight-convertibles-comparison/).
For the recline, go ahead and adjust it to wherever is comfortable for your child. Britax allows the recline to be at any position you want, as long as it’s appropriate for the child (meaning the most recline for a newborn, for example, and more upright for older kids).
We just purchased this seat this weekend and so far we are mixed on it. The quality is obviously amazing and our little one (10 months) loves sitting in it. However, it takes up much more space than we expected and the buckle strap is insanely short, I can’t see this being comfortable for babies with chubby thighs lol
Question: Is there any recommendations for making the short buckle strap more comfortable/usable or does Britax offer a longer version we could switch out?
Hi Cari. Britax is aware of the issues with the short buckle strap. Our contact doesn’t have any information on if or when there will be a replacement available.
Hi, I just got this seat today and am also really concerned about the length of the crotch strap. My baby is only 9 months old and it looks like it’s digging into her leg already. Any update on replacing the strap? Otherwise I think I’m going to return it and go with an evenflo instead
Hi Natalie. I haven’t heard that Britax has moved on the length of the crotch strap. You may want to call them and voice your concerns or send them a post on their FB page.
I called Britax customer service this morning (9/8/15) and was told they were lengthening the crotch strap in the convertible seats that will be released as of September 14th. These seats will not be included in the recall. Can anyone with a reliable contact confirm the longer crotch strap? I really want to buy one but am concerned about this issue.
Hi Debbie. We’re checking on that for you.
Hi Heather,
Just wondering if there has been any update/confirmation re: the lengthening of crotch straps on convertible seats released as of September 14th, 2015?
We are keen to buy a seat soon (our babies arrival is expected mid-November), and have our eye on the CT versions of both the Marathon and Boulevard, but are concerned about the crotch strap length after reading your review and other’s comments…
Hi Melissa. Yes, I just got word that they don’t have a longer crotch strap nor do they have current plans for a new one. I’d suggest commenting on their FB page, at the very least, about it affecting your purchasing decision.
Okay, I am ready to buy this car seat but I just have one question. Is this car seat easily transferrable from one car to another? The reason being that I take my daughter to the sitter in the mornings but my husband picks her up in the evenings. Any help would be much appreciated! Thanks!
It sure is, but keep in mind that it’s a really heavy seat and the more often you uninstall/install a seat, the more likely it is that you will make a mistake in installation. Have you considered buying a second, less expensive seat for your husband’s car (or yours?)? Most parents keep one carseat in each vehicle and use the less expensive carseat in the vehicle that gets less use.
That is a great idea, thanks!
I have the frontier 90 click tight for my four year old but would love this for my one year old to use!
The best part of the car seat that I am always looking for is a 5-pt harness, easy to adjust the settings. This one looks like it has an exceptional amount of padding.
I love the marathon clicktight, so much easier to move from one car to other. The weight and height limits are great, is a very long lasting car seat.
Love this seat! Click tight looks amazing for ease of install!
I love Britax car seats and strollers because I can count on them to keep my child safe. My 15 month old is still in his bsafe and we also have a b agile. They are quality made and last long. Cleaning then is easy thank to the easy dry breathable fabric. I would love to upgrade soon to a click tight because A) I trust the Britax brand and B) it’s so easy to install! 🙂
This is so awesome and I know that it would be great for my 18 month old daughter 🙂 🙂
Love this car seat!
I love how easy and secure Britax car seats are
Love this review. I really want one of these when my little outgrows his infant seat.
Thank you for the informative review.
great modern look and easy care instructions (hand wash, line dry, 4 separate parts to wash only what’s needed, easy to take off and put back on)! sounds great for mom of a spit-up-prone toddler (on longer car rides).
Very helpful!
Thanks for the wonderful review. Do you know the width of the car seat. We are trying to decide between this and the Diono Rainer. We have 3 seats to fit in the back of our second car.
Thanks in advance.
Love click tight. My car does not have latch anchors so this would make moving the seat from my to hubby’s car so much easier.
Nice for patents who have to uninstall and reinstall frequently in different vehicles.
very nice can a kid weight 70 pounds fit in this carseat or what right for him he 4 foot tall
Hi Ruby,
The Marathon, Boulevard, & Advocate are rated to 65 lbs, so no, these seats are not suitable for a child that weighs 70 lbs. I’d suggest the Britax Frontier combination seat OR a booster seat for a child that weighs 70 lbs and is 48″ tall (except if he’s only 3 years old or has a disability that affects using a booster seat).