~Britax Marathon G4.1 (discontinued)
Carseat NameMarathon G4.1
CarseatBlog Recommended Seat
Available atBuy at Amazon.com
Available in Canada
RF Weight Limits5-40 lbs.
RF Height Limits
FF Weight Limits20-65 lbs.
Age Limits
Type of Energy-Absorbing FoamEPP foam
Carseat NameMarathon G4.1
No Re-thread Harness?
Number of harness height positions
Bottom/Lowest Harness Slot9 in.
2nd Harness Slot or Highest Harness Slot17 in.
3rd Harness Slot
4th Harness Slot
5th Harness Slot
Closest Buckle Slot5.5 in.
2nd Buckle Slot8 in.
3rd Buckle Slot
Special Buckle Routing for Small Babies
Carseat NameMarathon G4.1
Inside Shoulder Width14 in.
Inside Hip Width
Inside Seat Depth12 in.
Inside Seat Height24 in.
External Widest Point19 in.
Seat Weight19 lbs.
Carseat NameMarathon G4.1
Recline Indicator StyleLine
Recline Indicator LocationOn side of seat
Number of RF Recline Positions1
Number of FF Recline Positions2
Has Anti-Rebound Bar or RF Tether?
RF Lockoff
FF Lockoff
Type of LATCH ConnectorsPush-on
RF LATCH connectors/belt path are separate from RF seat belt/belt path
FF LATCH connectors/belt path are separate from FF seat belt/belt path
LATCH Weight Limit40 lbs.
Non-standard LATCH Policy (Can “borrow” LATCH anchors”)Permitted only in designated LATCH positions
Inflatable Seat Belt PolicyLATCH is the preferred method of installation. If LATCH is not an option, leave lockoffs closed and lock seat belt retractor.
Carseat NameMarathon G4.1
Cover Removal/InstallationEasy
Cover Washing InstructionsHand wash and air dry
Expiration7 years
Crash GuidelinesFollow NHTSA crash guidelines
FAA Certified?
O CanadaAvailable in Canada with name “Marathon” or Marathon G4.1; requires anti-rebound bar when rear-facing; FF 22-65lbs.
Manufacturing CountryUSA
CarseatBlog.com ReviewMarathon Review Pt. 1, Marathon Review Pt. 2, Marathon Review Pt. 3
Available AtBuy at Amazon.com
Price or MSRP$217.49