Britax Marathon ClickTight Convertible Car Seat

Infant car seats are used for the first few months of newborns. What to use after that?

Convertible car seats are manufactured and designed for growing babies. They are used for newborns to toddlers. So it is better to buy a car seat that can be used for your baby until he gets rid of the car seat. 

A convertible car seat offers forward-facing mode, rear-facing mode and sometimes booster mode too. The most commonly used modes are the forward and rear-facing modes. 

Unlike the infant car seats, the convertible car seats are designed to remain in the car. The infant car seat can be taken anywhere with you and is easily removed from the car but the convertible car seats cannot be carried like that. 

Most of the parents do opt for the convertible car seats because these seats have more height ranges and weight capacity than other car seats.

In this article, we are discussing one of the best convertible car seats, which is presented by Britax. Below you will see a detailed description of the Britax Marathon ClickTight Convertible Car Seat.

Britax Marathon ClickTight Convertible Car Seat Overview: 

The Marathon ClickTight convertible car seat has a patented CT installation system, safe cell impact protection, and a layer of side impact protection. These features give you a peace of mind while you are on the way with your child. In the marathon car seat, your baby is surrounded with multiple safety features. This convertible car seat features Britax safe cell impact protection system. This protection system includes a high-strength integrated steel frame, V-shaped tether to minimize seat rotation, an energy-absorbing base, and staged release stitches that reduce and tend to slow forward movement in a crash. This seat protects your baby from side impacts.

The fabric of the seat is made of premium quality and is highly padded to provide maximum comfort. This car seat has 7 recline positions that ensures maximum comfort for your baby. The harness and the headrest can be adjusted in 14 different positions and they grow along with the growth of your child. The height of the seat can be changed with just the push of a button. The marathon car seat allows the rear-facing mode with a weight limit between 5-40 pounds and forward-facing mode with a weight limit between 20-65 pounds. The seat has a child standing height of 49 inches or less. It has a dimension of 23 x 18.5 x 23.5 inches. This convertible car seat is approved by FAA.

Britax Marathon ClickTight Convertible Car Seat


Following is the detailed description of Britax Marathon ClickTight Convertible Car Seat:

ClickTight Installation System: 

The installation of a Britax Marathon car seat is quite easy. This convertible seat is safe and simple to use. It comes with the ClickTight installation system. It only takes three quick steps for installation. You need to open the front of the car seat, attach the seat belt through the indicated path and click the seat shut. This is what you need to do for rock-solid installation. The seat is installed without the weight, seat or belt limits of the LATCH.

Side Impact Protection:

As you know, this car seat is equipped with multiple safety features. One of these features is the side-impact protection system. The seat is manufactured by a deep foam-lined shell. This layer of protection absorbs energy and shields your baby from the most dangerous type of collisions and impacts. 

SafeCell Impact Protection:

SafeCell impact protection is a safety system that is composed of a steel frame, an energy-absorbing base and a patented V-shaped tether. 

  • Impact-absorbing base:

The base of the car seat also plays an important role in providing protection to the baby. It is an impact-absorbing base that compresses whenever it faces any impact; it reduces or slows down the force of the collision.

  • Impact-stabilizing steel frame:

The frame of the car seat is made of premium quality. At the connection point of the vehicle, it offers superior strength where it is needed the most. 

  • Patented V-shaped tether:

The patented V-shaped tether is to minimize the rotation of the seat with a unique two-strap design. The staged-release stitches slow and reduce forward movement of the car seat during a crash.

Quick-adjust 14-position harness and 2-position buckle:

The car seat has a quick-adjust harness and headrest allowing 14 different positions. The harness and headrest can be adjusted according to the height of the child. Both of these increase with the growth of the child. You can easily move the harness upward and buckle outward for a comfortable secure fit. The buckle also offers 2-position.

7-position recline:

The car seat offers 7 different recline positions. These multiple recline positions make it easy to find the proper angle for installing your child’s car seat. 

Auto-level indicator:

There is an auto-level indicator that is adjusted for the comfort of your child while ensuring the best installation angle and position for your vehicle.

Plush foam padding and fabrics: 

For premium comfort, the car seat is completely padded with plush foam. 

Easy-buckle system: 

The buckles are easy to deal with. 

Easy-remove cover: 

The cover of the seat is removable so that you can clean it on a regular basis to get rid of dirt and mess. The seat cover can be easily removed without removing the harness. 


Brand: Britax
Color: Verve 
Seat type: Convertible car seat
Dimension: 23 x 18.5 x 23.5 inches
Weight: 27 pounds
Harness type: 5-point
Recline positions: 7
Style: Marathon 
Target gender: Unisex 
Material type:  Steel and mesh fabric
Orientation: Rear-facing 
Shoulder width: 16 inches
Child standing height: 49 inches or less
Minimum weight recommendation: 5 pounds
Maximum weight recommendation: 65 pounds
Model number: E1A385R
Rear-facing minimum child weight: 5 pounds
Rear-facing maximum child weight: 40 pounds
Forward-facing minimum child weight: 20 pounds
Forward-facing maximum child weight: 65 pounds


  • ClickTight installation
  • Side impact protection
  • Britax exclusive SafeCell Technology
  • Patented V-shaped tether 
  • High strength impact-stabilizing steel frame
  • 7-position recline
  • 14-position quick adjust headrest and harness
  • 5-point safety harness
  • Removable seat cover
  • No-rethread harness
  • Made in USA
  • Premium fabric and padding 
  • 1 year warranty
  • 10 years expiration
  • Easy-to-read auto-level indicators
  • Impact absorbing base
  • Flip-forward buckle 
  • Harness adjuster 
  • FAA approved


  • The Britax Marathon is available in a large variety of colors. 
  • It comes with a number of safety features.
  • The seat offers 7 recline positions.
  • The height and weight limits for rear-facing mode is better than other convertible seats.
  • The harness straps are thick enough that they are not susceptible to twisting.
  • It is made of premium fabric and has extra padding for comfort. 
  • The flip-forward buckle is easy to buckle and unbuckle.
  • This convertible car seat offers a super easy installation with ClickTight system.
  • It does not require rear LATCH installation.
  • This car seat is certified for use in the aircraft.
  • 14 positions of the harness are available.
  • The rear-facing mode is usable until your baby reaches 40 pounds. 


  • It may not fit in all types of vehicles.
  • Dirt can be accumulated in the ClickTight button.


When it comes to safety and protection, the Britax Marathon ClickTight car seat comes on top of the best convertible car seats list. The seat comes with a number of safety features. It has been crash-tested and is approved by the FAA that means it can be taken in an airplane. Most of the parents think that Britax Marathon is a very reliable product as it has proven itself in real-life crashes. 

The price of this car seat may be high for some parents but when its features are observed the price seems to be very reasonable. Also it is a good decision to buy a good product at a high price instead of spending on the same product again and again. The Britax Marathon ClickTight car seat is not as expensive, when compared to its own product line of baby car seats, you will observe that it is on the lower end of the price scale. 

Overall, this car seat has some premium features that make it attractive. For parents who are interested to buy this car seat, we would recommend them to take note of the dimensions of the car seat first to check if it is compatible with their vehicle. 

Hope so that the article will be helpful for you.