The Marathon ClickTight Convertible Car Seat features our ClickTight Installation System, making installation as easy as buckling a seatbelt. SafeCell Impact Protection surrounds your little one in safety and Side Impact Protection formed by a deep energy-absorbing shell, shields your child from the most severe type of collision.
ClickTight Installation Systemis safe and simple to use. Open the front of the car seat, feed the seatbelt through the indicated path and click the seat shut. That’s all you need to do for rock-solid installation.
Side Impact Proetction formed by a deep foam-lined shell absorbs energy and shield your child from the most dangerous type of collision.
SafeCell Impact Protectionis a safety system including a steel frame, energy-absorbing base and patented V-shaped tether.
Impact-absorbing basecompresses to reduce the force of a collision.
Impact-stabilizing steel frameoffers superior strength where you need it most: at the connection point to the vehicle.
Patented V-shaped tetherminimizes seat rotation with a unique two-strap design and staged-release stitches that slow and reduce forward movement during a crash.
Quick-adjust 12-position harness and 2-position buckleallows you to easily move the harness upward and buckle outward for a comfortable secure fit as your child grows.
7-position recline with automatic level indicatoradjusts for your child’s comfort while ensuring the best installation angle for your vehicle.
Plush foam padding and fabricsfor premium comfort.
Easy-buckle systemkeeps buckles and straps out of your way when positioning your child.
Easy-remove coverpulls free of the car seat for cleaning without having to remove the harness.
1 Year Warranty
10 Year Expiration
Child Weight Rear-Facing
5 - 40 lbs
Child Weight Forward-Facing
20 - 65 lbs*
Child Standing Height
49" or less
Child Seated Shoulder Height Rear-Facing
7.6 - 16.95"
Child Seated Shoulder Height Forward-Facing
12 - 16.95"
18.5" W x 23.5" H x 23" D
Seat Area Depth / Width
10.5" / 11.5"
Harness Slot Heights
8.35 to 17.7" (.85" increments), 12 positions
Buckle Strap Depths
5.25" / 7"
The American Academy of Pediatrics recommends that all infants and toddlers should ride in a Rear-Facing Car Seat until they are 2 years of age or until they reach the highest weight or height allowed by their car seat manufacturer. BRITAX strongly recommends that children ride rear facing to the highest weight or height specified.