Keep up to date on the latest StrollerMama releases, special sales
and a lot more...


  HACKER SAFE certified sites prevent over 99.9% of hacker crime.

Britax Marathon 70

Britax Marathon 70

Britax logo
Britax Marathon

Car Seat Weight: 16.5 lbs.

Max. weight capacity: 40 lbs. rear facing, 70 lbs. forward facing

Max. height capacity:
49" or less

Harness slot heights:
10"/ 12.25"/14.5"/16.75"

Dimensions: 19.5 " x 27.5" x 25.5"

Seat area depth: 9"

Seat area width: 11"

Seating compartment height: 24.5"

Shoulder width: 11.75"

The Britax Marathon 70 is probably one of the most popular car seats for our parents. Britax has an unbeatable reputution for safety and comfort. The Britax Marathon 70 is a convertible car seat that works rear-facing from 5-40 lbs. and then works forward-facing up to 70 lbs. It is recommended that the child be at least one year old AND 20 lbs. before switching the car seat to the forward facing position.

In terms of safety, the Marathon has Britax's best features. Features include:

The patented Versa-Tether anchors the car seat to the top of seat to minimize movement in a crash.

The premium push-buttom LATCH system allows for a tight fit and an easy installation. Traditional seat belt installation may also be used.

The tangle-free five-point harness has four different shoulder heights that adjust at the back of the seat for a snug and secure fit. The button in front allows for easy adjustment of the straps to accommodate differences in bulkiness (sometimes your child is wearing a heavier coat versus a lighter shirt).

There is also rear and forward facing recline positions for your child's comfort.

The cover is removable and machine-washable.

The Marathon is approved for air travel.

All Britax car seats are made in the U.S.A.

Britax Made in the U.S.A.Britax approved for airline use


Installing a car seat properly is a must. Please follow the instructions precisely or have the seat professionally installed by a certified car seat inspection facility.

For customer support, please email us at
or call toll free at (866) 293-5642.

view-cart About StrollerMama StrollerMama Home StrollerMama