Use our comprehensive specs comparison table to quickly decide between Britax Marathon G4.1 and Britax Roundabout G4.1.
Britax Marathon G4.1 vs Britax Roundabout G4.1

Britax Marathon G4.1

Britax Roundabout G4.1

Spec Comparison of Britax Marathon G4.1 and Britax Roundabout G4.1

Britax Marathon G4.1 Britax Roundabout G4.1
Our rating: Our rating:
Type
Convertible Car Seat Convertible Car Seat
Color Options
Azul, Confetti, Onyx, Domino, Gridline, Jet set, Pink giraffe, Silver cloud, Static, Dash, Luna, Marthon, Silverlake
Child Weight Min – Rear Facing
5 lbs
5 lbs
Child Weight Max- Rear Facing
40 lbs
40 lbs
Child Weight Max- Forward Facing
20-65 lbs 20-55 lbs
Child Standing Height
49″ or less
46″ or less
Child Seated Shoulder Height Min – Rear Facing
9″
9″
Child Seated Shoulder Height Max – Rear Facing
16.75″
15.75″
Child Seated Shoulder Height – Forward Facing
12-16.75″ 12 – 15.75″
Shoulder Width
13″
13″
Inside Hip Width
14″
11″
Inside Seat Depth
12″
11″
Inside Seat Height
24″
23″
External Widest Point
19″
19″
Type of Harness
10-position, quick-adjust harness 5 point No Re-thread Harness
Lowest Harness Position
8.5″
Highest Harness Position
17.5″
17.5″
Expiration Date
7 years 7 years
Car Seat Weight
19.5 lbs
17.6 lbs
Car Seat Height
26″
26″
Car Seat Width
18.5″
18.5″
Car Seat Depth
21″
21″
Features
  • Safe cell impact protection is an integrated system of safety components that work together to protect your child beyond the federal safety standards, this includes our impact absorbing base and complete side impact protection plus
  • Safe cell complete side impact protection plus provides an advanced level of protection: a deep, foam-lined shell absorbs crash forces and shields your child from debris, and an energy-absorbing headrest keeps your child’s head and neck secure
  • Quick-adjust, 10-position harness and 2-position buckle allows you to easily move the harness upward and buckle outward for a comfortable, secure fit as your child grows
  • Safe cell impact protection is an integrated system of safety components that work together to protect your child beyond the federal safety standards, this includes our impact absorbing base and complete side impact protection plus
  • Safecell complete side impact protection surrounds your child in a deep protective shell designed to absorb crash forces and shield your child from debris
  • Tangle-free, 5-point harness prevents the straps from twisting making it easier to load your child into the seat and ensuring a safer ride
  • 3 recline positions for your child’s comfort and safety
  • Quick-adjust 2-position buckle allows you to easily move the buckle outward for a comfortable, secure fit as your child grows

Britax Marathon G4.1 Reviews

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Britax Roundabout G4.1 Reviews

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    Britax Marathon G4.1 vs Britax Roundabout G4.1

    Britax Marathon G4.1 vs Britax Roundabout G4.1