• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Kid Safety First Logo

Kid Safety First

  • Car Seats
    • Car Seat Buying Guides
      • Best Convertible Car Seat Buying Guide
    • Infant Seats (USA)
      • Britax B-Safe Review
      • Britax B-Safe 35 Infant Car Seat Review
      • Britax Chaperone Review
      • Britax Endeavours Infant Car Seat Review
      • Chicco Keyfit 30 Review
      • Maxi-Cosi Mico Review
      • Peg Perego SIP 30/30 Review
      • Peg Perego 4-35 Review
      • Safety 1st Infant Car Seats Reviewed
      • Infant Comparison Reviews
        • Britax B-Safe vs B-Safe 35 Infant Seats – Comparison Review
        • Britax B-Safe vs B-Safe 35 Elite Reviewed
        • Britax B-Safe 35 vs B-Safe 35 Elite Reviewed
        • Britax B-Safe 35 Elite vs Endeavours – Comparison Review
        • Britax B-Safe 35 vs Britax Endeavours Comparison Review
        • Britax B-Safe 35 vs B-Safe Ultra Compared
        • Britax B-Safe Ultra Car Seat Review
        • Britax B-Safe 35 Elite vs B-Safe Ultra Compared
        • Britax Endeavours vs B-Safe Ultra Infant Seats Compared
        • Chicco Keyfit 30 vs Keyfit 30 Zip – A Comparison Review
        • Chicco Keyfit 30 vs Keyfit 30 Zip Air Compared
        • Maxi-Cosi Mico AP vs Mico Max 30 Compared
        • Peg Perego Primo Viaggio 4-35 vs Nido Compared
    • Convertible Seats (USA)
      • Britax Advocate ClickTight ARB Review
      • Britax Boulevard ClickTight ARB Review
      • Britax Marathon ClickTight Review
      • Britax Roundabout G4.1 Review
      • Chicco Nextfit 65 Review
      • Clek Fllo Review 2023
      • Clek Foonf Review
      • Diono Olympia Review
      • Diono Pacifica Review
      • Diono Radian RXT Review
      • Diono Rainier Review
      • Graco Contender 65 Review
      • Graco Extend2Fit Convertible Seat Review
      • Graco Size4Me 65 Convertible Review
      • Maxi-Cosi Pria 70 With TinyFit Review
      • Maxi-Cosi Pria 85 Review
      • Peg Perego Convertible Car Seat Review
      • Recaro Performance Racer Review
      • Recaro Performance Ride Review
      • Recaro ProRide Review
      • Convertible Seat Comparisons
        • Britax Advocate ClickTight vs Boulevard ClickTight
        • Britax Advocate ClickTight v Boulevard ClickTight Review
        • Britax Advocate ClickTight vs Marathon ClickTight
        • Britax Advocate ClickTight v Marathon ClickTight Review
        • Britax Boulevard ClickTight v Marathon ClickTight Review
        • Britax Boulevard ClickTight vs Chicco Nextfit Zip Compared
        • Britax Marathon ClickTight vs Chicco Nextfit 65 Compared
        • Britax Marathon ClickTight vs Maxi-Cosi Pria 70 Compared
        • Britax Roundabout G4.1 vs Marathon G4.1 Compared
        • Britax Roundabout G4.1 vs Boulevard G4.1 Compared
        • Chicco Nextfit 65 vs Nextfit iX Zip – Comparison Review
        • Chicco Nextfit iX vs Nextfit iX Zip Compared
        • Chicco Nextfit 65 vs Nextfit iX Zip LUXE Compared
        • Chicco Nextfit 65 vs Nextfit iX – Comparison Review
        • Chicco Nextfit iX vs Nextfit iX Zip Air – Comparison Review
        • Diono Rainier vs Diono Olympia
        • Diono Pacifica vs Diono Olympia – A Comparison Review
        • Diono Rainier vs Diono Pacifica
        • Graco Contender vs Size4Me Seats Compared
        • Maxi-Cosi Pria 70 vs Pria 85 Compared
        • Maxi-Cosi Pria 70 vs Vello 70 Comparison Review
        • Recaro ProRIDE vs Performance RIDE
        • Recaro Performance Racer vs Rally Review
        • Recaro Performance Racer vs Roadster Comparison Review
        • Recaro Performance Rally vs Roadster Comparison Review
    • Combination Harness-2-Booster Seats (USA)
      • Britax Pioneer 70 Review
      • Britax Frontier 90 Review
      • Britax Pinnacle 90 Review
      • Diono Radian RXT Review
      • Diono Ranier Review
      • Seat Comparison Reviews
        • Britax Frontier 90 vs Pioneer 70
        • Britax Frontier 90 vs Recaro Performance Sport
        • Britax Pinnacle 90 vs Pioneer 70
        • Britax Pinnacle 90 vs Frontier 90
        • Britax Pinnacle 90 vs Recaro Performance Sport
        • Clek Foonf vs Fllo Review
        • Diono Radian RXT vs Radian R120 – Comparison Review
        • Diono Radian RXT vs Diono Rainier
        • Graco 4Ever All-in-One vs Milestone All-in-One Compared
        • Peg Perego Viaggio HBB 120 vs Flex 120 Compared
        • Recaro Performance Racer vs Rally Review
        • Recaro ProRIDE vs Performance RIDE
    • Booster Seats (USA)
      • Chicco Kidfit vs Kidfit Zip Booster Seats Compared
      • Clek Oobr Booster Seat Review
      • Peg Perego Primo Viaggio Flex 120 Booster Seat Review
      • Recaro ProRide Review
      • Graco Affix Booster Seat Review
    • Car Seat Bases (USA)
      • Britax B-Safe Base Review
      • Chicco Keyfit 30 Base Review
      • Maxi Cosi Mico Base Review
  • Edges & Corners
    • Prince Lionheart Edges & Corners
  • Fire & Gas
    • Cheap Carbon Monoxide Detector
    • Fireguards
    • Home Fire Ladder
    • Kidde Carbon Monoxide Detectors
    • Plug Carbon Monoxide Detector
  • Indoors
    • Best Furniture Anchors for the Home
    • Childproof Cabinet Locks (USA)
  • Out & About
    • Bikes / Scooters
      • Best Safety Helmets For Toddlers
      • Best Scooter Helmets
      • Giro Scamp MIPS Helmet Review – Safety Helmets For Kids
      • Mini Micro Scooter Review
      • Micro Maxi Scooter Review
      • Micro Sprite Kick Scooter Review
      • Nutcase Little Nutty Bike Helmets Reviewed
      • The Best 3 Wheel Scooters for Kids
    • Reins / Backpacks
      • Child Harness Backpacks
    • Strollers
      • Baby Jogger City Mini Double Review
      • Baby Jogger City Mini GT Double Stroller Review
      • Baby Jogger City Mini Double vs City Mini GT Double
      • The Baby Jogger City Select Stroller Review – 2014 Model
      • Baby Jogger Summit X3 Stroller Review
      • BOB Revolution Pro Stroller Review
      • BOB Revolution Flex vs Revolution Pro Compared
      • BOB Revolution SE vs Revolution Flex Comparison Review
      • BOB Revolution SE vs Revolution Pro Comparison Review
      • Britax B-Agile Travel System Review – 2014 Edition
  • Sleeping Safely
    • Baby Monitors
      • Infant Optics DXR-5 Review
      • Infant Optics DXR-8 Review
      • Philips Avent Dect Review
      • Snuza Hero Baby Movement Monitor
      • V Tech Communications Safe & Sound Review
    • Bed Rails
      • Babydan Sleep n Safe Bed Rail
  • Air Quality
    • Do Air Purifiers Really Work?
  • Blog

Britax Marathon 70-G3 Review

February 18, 2014 By Kristian

List Price: $289
Weight Range: 5 to 65 lbs

The Good – ISOFIX Base with SafeCell technology; Integrated Steel Bars; HUGS Chest Pads; Standard Side Impact Protection; No re-thread harness system.

The Bad – Despite lacking some of the extra features of the new Marathon G4, it is no cheaper. It lacks the G4’s infant insert and updated HUGS system.

The Bottom Line – The Britax Marathon 70-G3 is a very good convertible car seat. However, it has now been replaced by the Marathon G4.

READ ABOUT THE BRITAX CLICKTIGHT SEATS HERE

Britax Marathon 70-G3 – Overview


This is my fully independent and objective Britax Marathon 70-G3 Review.

Britax are one of the most popular child car seat manufacturers in the world. The continue to manufacture high quality seats that are safe, comfortable and  easy to use.

The Britax Marathon 70-G3 comes in a variety of funky colour schemes. It comes with an abundance of padding and lots of adjustment settings to ensure a tight, yet comfortable, fit for your child.

The Versa Tether on the new Marathon 70-G3 is energy absorbing and works to reduce forward movement and rotation in a crash, which is reassuring.

Another nice feature of this and other Britax seats is the EZ-Buckle system. Basically, this system can be used to hold the buckle in a forwards position when you are seating your child, thus preventing them from getting hurt as a result of sitting onto the hard buckle. It also means that you don’t have to fish around under their bottom trying to find the buckle that they have just sat on. This might sound like a small matter, but I can promise you that it is not – I have spent many frustrating moments frantically playing “hunt the buckle” whilst getting wet and cold in the rain. Its not a fun and neither is starting a journey with a child who is crying as a result of sitting on the seat buckle.

Key Features


  • Premium LATCH tether system fitted
  • Suitable for children weighing between 5 – 70 lbs (Must use Belt-fitting when child over 46 lbs)
  • 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
  • HUGS- Harness Ultra Guard System chest pads provides resistance to forward movement in the event of a crash
  • Side impact protection comprised of deep side walls lined with energy-absorbing EPP foam distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body

Peace of Mind


Like most Britax car seats, the Marathon 70-G3 scores very highly in safety tests. It is well padded and comes with a side impact protection system that exceeds the minimum safety requirements.

Value for Money


The price of the Britax Marathon 70-3G fluctuates and you will need to click the link below to check the current price.

THIS SEAT HAS NOW BEEN DISCONTINUED

FIND THE CLICKTIGHT VERSION HERE.

February 2014 LATCH Guidelines


Britax now advises that the LATCH lower tethers should only be used on this model until the child weighs more than 46 lbs. You can still continue to use the seat until the child weighs 70 lbs, but only if you re-install the seat using the adult seat belt instead. You should still use the top tethers as they are not affected by the law change.

Since this car seat weighs only 19 lbs, you can install it using the premium LATCH tethers for longer than many other car seats. For example the Britax Marathon G4 must be belt-fitted when the child weighs more than 40 lbs.

Read more about this law change here.

Where to Buy the Britax Marathon 70-G3


Click Here to Check Price at Amazon

New Britax ClickTight Convertible Car Seats


Britax released a brand new range of convertible car seats in Autumn 2014, featuring their revolutionary “ClickTight” belt-installation system.

Britax ClickTight Convertible Car Seat Comparison Reviews Banner

Safety Information


After purchasing any child car seat, you should always read the User Manual thoroughly before using it. It is also advisable to visit your local Fire Department or NHTSA Child Car Seat Inspection Centre to ensure that the seat is definitely suitable for your child’s specific requirements and that you have installed it correctly. These services are usually provided free of charge.

You can find your nearest NHTSA Centre here.

Further Information


You can read my “Convertible Car Seat Reviews” post here to compare my 5 best seats.

If you have any feedback or questions about my Britax Marathon 70-G3 Review, please feel free to leave a comment below or send an email to kristian@kidsafetyfirst.com

convertible car seat reviews

facebookShare on Facebook
TwitterTweet
FollowFollow us
PinterestSave

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Find More Reviews

Featured Comparison Reviews

Chicco OneFit v Fit4 Comparison Review

   vs    If you are looking to buy a car seat for your child, Chicco products should definitely be towards the top of your shortlist of options. They are one of the most well-known and well-respected manufacturers of high-quality premium … [Read More...] about Chicco OneFit v Fit4 Comparison Review

Best Diono All in One Car Seats

Diono All in One Car Seats - Introduction If you are looking for the best Diono all-in-one car seat, you need to take a close look at the Diono Radian 3Q range. The Diono Radian 3Q series of all-on-one car seats was introduced to the US Market as a … [Read More...] about Best Diono All in One Car Seats

Diono Radian Comparison Reviews

Diono Radian Child Car Seats The Diono Radian product line of child car seats has been available to buy in the USA and Canada for many years now. Despite this fact, they have not just stayed the same and become outdated. Instead, Diono have … [Read More...] about Diono Radian Comparison Reviews

Best Diono Harness to Booster Seats 2023

Diono Harness to Booster Seats in 2023 - Introduction If you are looking for the best Diono harness to booster car seat to buy in 2023, you need to look at the Diono Radian 3Q range. The Diono Radian 3Q series of harness to booster car seats was … [Read More...] about Best Diono Harness to Booster Seats 2023

Best Britax Harness to Booster Seat 2023

Britax Harness to Booster Seats in 2023 - Introduction If you are looking for the best Britax harness to booster car seat to buy in 2023, you need to look at the Britax Grow With You product range. The Britax Grow With You series of harness to … [Read More...] about Best Britax Harness to Booster Seat 2023

Britax B Safe Infant Car Seat Reviews

The Britax B Safe Gen2 Infant Car Seats I have recently written a series of in-depth reviews of the latest Britax range of Infant Car Seats, which the B Safe Gen2 series. Those reviews come in the form of both individual car seat reviews and side-by-side … [Read More...] about Britax B Safe Infant Car Seat Reviews

Featured Car Seat Reviews

Britax One4Life ClickTight Review

Britax One4Life ClickTight - Introduction Britax has been making high-end premium infant car seats, convertible car seats, and harness to booster car seats for many years now. Their child car seat products have proved very popular with parents in the USA and … [Read More...] about Britax One4Life ClickTight Review

Britax Grow With You ClickTight Plus Review

Britax Grow With You ClickTight Plus - Introduction The Britax Grow With You ClickTight Plus is a harness-to-booster car seat that effectively replaces the discontinued Britax Pinnacle 90 seat, which was a hugely popular child car seat in the US for many … [Read More...] about Britax Grow With You ClickTight Plus Review

Clek Liing Infant Car Seat Review

Clek Liing Infant Seat - Introduction The Clek company has been manufacturing high quality child car seats for many years. One of their latest infant car seats available for purchase in the US and Canada is the Clek Liing. If you are looking to buy … [Read More...] about Clek Liing Infant Car Seat Review

Britax B-Safe Gen2 Flexfit Review

Britax B-Safe Gen2 Flexfit Infant Seat - Introduction The Britax B-Safe Gen2 Flexfit Infant Car Seat was introduced to the US Market in 2021 and is one of the products that replaces, and improves upon, the older B-Safe 35 and B-Safe Ultra series of … [Read More...] about Britax B-Safe Gen2 Flexfit Review

Britax B-Safe Gen2 Flexfit Plus Review

Britax B-Safe Gen2 Flexfit Plus Infant Seat - Introduction The Britax B-Safe Gen2 Flexfit Plus Infant Car Seat was introduced to the US Market in 2021 and effectively replaces, and improves upon, the older B-Safe 35 Elite and Ultra series of … [Read More...] about Britax B-Safe Gen2 Flexfit Plus Review

Britax Marathon ClickTight Review

The Britax Marathon ClickTight - Overview The Britax Marathon ClickTight is the entry-level seat in the series. Despite being significantly cheaper than the Advocate and Boulevard seats, it still comes fitted with some pretty impressive safety and … [Read More...] about Britax Marathon ClickTight Review

Recent Posts

  • Infant Car Seats vs All in One Car Seats
    By Kristian
    February 13, 2023
  • Infant Car Seats v Convertible Car Seats
    By Kristian
    January 29, 2023
  • Chicco MyFit Harness to Booster Seat Review
    By Kristian
    January 18, 2023
  • Best Harness to Booster Seat Under $200
    By Kristian
    January 12, 2023
  • Best Harness to Booster Seats 2023
    By Kristian
    December 30, 2022
  • Chicco Fit4 Adapt v OneFit Compared
    By Kristian
    December 5, 2022
  • Chicco OneFit v Fit4 Comparison Review
    By Kristian
    November 29, 2022
  • Best Car Seats For Newborns
    By Kristian
    November 24, 2022
  • Best All in One Car Seats 2023
    By Kristian
    November 24, 2022
  • Best Convertible Car Seat 2023
    By Kristian
    November 23, 2022
  • Best All in One Car Seats For Small Cars
    By Kristian
    November 22, 2022
  • Best Infant Car Seats 2023
    By Kristian
    November 21, 2022

Car Seat Comparison #2

Best Diono All in One Car Seats

Diono All in One Car Seats - Introduction If you are looking for the best Diono all-in-one car seat, you need to take a close look at the Diono … [Read More...] about Best Diono All in One Car Seats

Featured Car Seat Reviews

Britax One4Life ClickTight Review

Britax One4Life ClickTight - Introduction Britax has been making high-end premium infant car seats, convertible car seats, and harness to booster car seats for many years now. Their child car seat products have proved very popular with parents in the USA and … [Read More...] about Britax One4Life ClickTight Review

Britax Grow With You ClickTight Plus Review

Britax Grow With You ClickTight Plus - Introduction The Britax Grow With You ClickTight Plus is a harness-to-booster car seat that effectively replaces the discontinued Britax Pinnacle 90 seat, which was a hugely popular child car seat in the US for many … [Read More...] about Britax Grow With You ClickTight Plus Review

Clek Liing Infant Car Seat Review

Clek Liing Infant Seat - Introduction The Clek company has been manufacturing high quality child car seats for many years. One of their latest infant car seats available for purchase in the US and Canada is the Clek Liing. If you are looking to buy … [Read More...] about Clek Liing Infant Car Seat Review

Britax B-Safe Gen2 Flexfit Review

Britax B-Safe Gen2 Flexfit Infant Seat - Introduction The Britax B-Safe Gen2 Flexfit Infant Car Seat was introduced to the US Market in 2021 and is one of the products that replaces, and improves upon, the older B-Safe 35 and B-Safe Ultra series of … [Read More...] about Britax B-Safe Gen2 Flexfit Review

Britax B-Safe Gen2 Flexfit Plus Review

Britax B-Safe Gen2 Flexfit Plus Infant Seat - Introduction The Britax B-Safe Gen2 Flexfit Plus Infant Car Seat was introduced to the US Market in 2021 and effectively replaces, and improves upon, the older B-Safe 35 Elite and Ultra series of … [Read More...] about Britax B-Safe Gen2 Flexfit Plus Review

Britax Marathon ClickTight Review

The Britax Marathon ClickTight - Overview The Britax Marathon ClickTight is the entry-level seat in the series. Despite being significantly cheaper than the Advocate and Boulevard seats, it still comes fitted with some pretty impressive safety and … [Read More...] about Britax Marathon ClickTight Review

Footer

Legal Stuff

  • Affiliate Disclosure Statement
  • Privacy Policy

© 2024 Kid Safety First - All Rights Reserved