Marathon Converting Car Seat

Britax Marathon, Domino
Britax Marathon, Kiwi
Britax Marathon, Onyx
Britax Marathon, Pink Giraffe
Britax Marathon, Silver Cloud

Marathon Specifications:

Child Weight (lbs) Rear Facing: 5 - 40 (2.3 - 18.1 kg)
Forward Facing: 22 and walks unassisted, up to 65
(10 kg and walks unassisted, up to 29.5 kg)
Child Standing Height (in) 49 or less (124.5 cm or less)
Child Seated Shoulder Height (in) Rear Facing: 9 - 16.75 (22.9 - 42.5 cm)
Forward Facing: 12 - 16.75 (30.5 - 42.5 cm)
Product Weight - Car Seat Only (lbs) 19.5 (8.8 kgs)
Product Dimensions (in) 18.5W x 26H x 21D (47W x 66H x 53.3D cm)
Seat Back Compartment Height (in) 23.5 (59.7 cm)
Seat Area Depth / Width (in) 11 / 11 (27.9 / 27.9 cm)
Shoulder Width (in) 13 (33 cm)
Harness Slot Heights (in) 8.5 / 9.5 / 10.5 / 11.5 / 12.5 / 13.5 / 14.5 / 15.5 / 16.5 / 17.5
(21.6 / 24.1 / 26.7 / 29.2 / 31.8 / 34.3 / 36.8 / 39.4 / 41.9 / 44.5 cm)
Buckle Strap Depths (in) 5 / 7.5 (12.7 / 19.05 cm)

Marathon Features:

  • Base with SafeCell Technology features SafeCells 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, reducing the crash forces reaching the child, and a two-point attachment to minimize forward rotation while anchoring the top of the child seat
  • Anti-rebound bar limits child seat rotation in a crash when used rear facing.
  • Easy-Remove Cover allows easy cleaning without disassembling the harness or uninstalling the car seat
  • 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
  • Tangle-Free, Five-Point Harness distributes crash forces across the strongest parts of the body and provides a secure fit
  • Harness Ultra Guard System (HUGS) provides resistance to forward movement in the event of a crash
  • 65 lb (29.4 kg) Weight Capacity for safety and comfort as your child grows
  • Rear and Forward Facing Recline for child comfort and positioning
  • High Density Comfort Foam provides an extra layer of padding to gently cushion your child
  • Two Buckle Positions for your growing child
  • Quick-Adjust Harness repositions the harness shoulder height without disassembling the harness straps
  • Premium LUAS Connectors for a quick and simple installation featuring a push button for easy release
  • Built-in Lock-Offs ensure a snug lap and shoulder belt installation with minimal effort
  • Anti-Slip, Contoured Base grips and protects the vehicle seat while offering optimum vehicle fit
  • EZ-Buckle System and Harness Holders keep harness straps out of the way when placing your child in the car seat
  • Infant Positioning Pillow offers extra comfort while achieving proper harness fit for small infants