Britax Marathon CT – Mod Black


As your child grows from baby to toddler, the Marathon ClickTight convertible car seat easily transitions from rear-facing to forward-facing. With ClickTight, you can install with confidence, every time. Simply open, thread & buckle, click it closed. Plus, easy-read level indicators and a quick-push recline help you find the proper angle for your vehicle and most comfortable fit for your child.

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Full Body Protection: energy-absorbing shell surrounds your child’s head, neck, and torso

SafeCell Technology acts as a crumple zone in the car seat base, absorbing crash energy to help keep it away from your child.

High strength steel frame reinforces the seat structure to help keep it stabilized.

V-Shaped Tether with staged-release stitches help slow and reduce forward movement in a crash

ClickTight Installation: You’ll know it’s right in just 3 easy steps: Open, thread & buckle, click it closed.

Easy-Read Level Indicators help you find the correct recline angle for your vehicle.

14-position, quick-adjust harness & headrest create the perfect fit as your child grows.

7-Position, Quick-Push Recline helps you find the most comfortable fit for your child and the best fit for your vehicle.

Rear-facing mode easy switches to Forward-Facing Mode perfect for children starting anywhere from 5lbs up to 65lbs.

Flip-forward buckle stays out of the way for easy boarding.

Plush, foam padding & fabrics for premium comfort and a quiet ride.

Removable cover for easy cleaning without taking off the harness.

Child Fit Information

Rear-Facing Weight 5-40 lbs (2.26-18.14 kg)
Forward-facing Harnessed Weight 22 – 65 lbs (10-29.4 kg)
Seated Shoulder Height- Rear Facing 7.6-18.65” (19.30-47.37 cm)
Seated Shoulder Height- Forward Facing 12-18.65” (30.48-47.37 cm)

Exterior Product Dimensions
Product Weight 28.5 lbs (12.92 kg)
Product Dimensions (L x W x H) 23″ (L) x 18.5″ (W) x 23.5″ (H) (58.42 cm x 46.99 cm x 59.69 cm)
Headrest Fully Extended Height 30.25″ (76.83 cm)

Interior Product Dimensions
Seating Area Depth 10.5″ (26.67 cm)
Seating Area Width 11.5″ (29.21 cm)
Shoulder Width 16″ (40.64 cm)
Harness Slot Heights 8.35″(21.20 cm) to 19.4″(49.27 cm)

Buckle Strap Positions: 14 (.85″(2.1 cm) increments)
Buckle Strap Depth 5.25″(13.33 cm) / 7″ (17.7 cm)

Britax strongly recommends that children should be secured with a harness system until they exceed the weight or height limits specified.