How are the Britax Infant Car Seats Different: A Comparison Between the Britax B-Safe 35, B-Safe 35 Elite, Endeavours and B-Safe Ultra

Britax is a great company and they always tend to stay on top of their game. They recently phased out a few older model seats and introduced several new seats. There are TONS of similarities but also several changes in each one that help set them apart. I’ve compiled a few easy-to-navigate charts to help you see what the differences and similarities are so you can narrow down which seat is best for you and your family. The great news is that each seat has a different price point which helps them cater to multiple budgets, as well as needs, also. Continue reading for more information!


The Similarities:

All 4 of the Britax rear-facing infant seats will have ALL of these characteristics. Several reasons why we LOVE Britax! The 4 seats we’re discussing are the B-Safe 35, B-Safe 35 Elite, Endeavours and B-Safe Ultra. [NOTE: The B-Safe 35 Elite has been discontinued and is no longer available.]


  • Impact Stabilizing Steel Frame
  • Energy Absorbing Base
  • Energy Absorbing EPS Foam
  • 3 Recline Positions
  • Lower LATCH Connectors
  • Weight Capacity is Birth – 35 lbs
  • Travel System Compatible
  • Installation Level Indicators
  • ARB Base and 35 Base can be used on all 4 infant car seats.

The Differences:

This is where we get down to business. You’ve seen how they’re the same. Check out our table to find out what sets them apart!

DIFFERENCESB-Safe 35B-Safe 35 EliteB-Safe UltraEndeavours
Price$199.99$229.99$259.99$299.99
Layers of Side Impact    
Adjustable Harness Positions4 Adjustable Harness Positionsmust re-thread straps for each desired height   
Removable Comfort Pads    
Flip Forward Belly PadNot AvailableNot AvailableFlip-forward belly pad provides easy access to harness buckle & maximizes your baby’s comfort.Flip-forward belly pad provides easy access to harness buckle & maximizes your baby’s comfort.
Rideshare ReadyNot AvailableNot Available  
Anti-Rebound Bar    

Decision Time

Now that you know more about the seats that are available to you, we hop you can now make a confident decision on which one is best of you and your family. Car seat safety is incredible important and being able to make a decision based on facts is important.

Safety First

Now that you’ve maybe narrowed down which seat you works for your family, make sure it’s installed correctly. See our blog below regarding the TOP 6 car seat installation mistakes.

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4 thoughts on “What’s the Difference Between ALL the Britax Infant Rear-Facing Car Seats?

  1. Marlie says:

    Hi, Is the crotch strap on the Britax Oneife the same length as the other Britax convertible Car seats? We have the Britax Marathon convertible but the crotch strap seemed to short for my boys and dug into their chubby thighs. We ended up getting the Chicco Nextfit for our other car because the strap was longer. We have the Britax Frontier booster seat the and the crotch strap on that one is longer than the one on the Marathon convertible seat. I am interested in the One4Life if the crotch strap is longer or is able to be made longer as the child grows Thank you!

    • Rachel Rising says:

      Hi Marlie! As far as I’m aware, they’re all the same size. However, the Britax convertible seats do have adjustable straps that allow for the straps to be shorter for newborns/infants, then lengthened for older children. If you look where the lower part of the strap attaches to the seat, (the attachment point closest to their little thighs), you’ll see that the fabric of the strap has a little loop. That loop will be hooked onto the inner loop for infants. You can detach the strap, and then re-attach it using the outer loop of fabric to lengthen the straps.

      This is from the Britax manual (pg. 23)
      BRITAX MARATHON CLICKTIGHT MANUAL
      Lengthening the Harness
      1. Open the CLICKTIGHT.
      a. Press the dimple on
      the CLICKTIGHT
      dial.
      b. Rotate dial clockwise
      until CLICKTIGHT
      releases and lift to
      open.
      2. Disconnect the end of
      one harness from the
      anchor on the bottom
      side of the seating area.
      3. Unwrap the end of the
      harness from the metal
      bar and pull to the top of
      the seating area.
      4. Slide the harness loop
      fully onto the same
      anchor from the top of the
      seating area ensuring that
      it is secure.
      5. Repeat on the other side.

      Hope this helps!! I LOVE the One4Life!!

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