Britax Car Seat Convertible Comparison

I’m often asked by parents which Britax convertible car seat is the best such as the Britax Roundabout vs Marathon or Britax Diplomat versus Boulevard.. The truth is, it depends upon your needs. The below product summaries should make it easy for you to compare Britax models and find what’s right for your family. For many of you, you decision will be influenced by the size of the back seat of your car, so it's strong recommended that you try out the following seats in your own car before making a decision.

	Roundabout	Diplomat	Marathon	Boulevard
	Compact Convertibles - Up to 40lbs		Mid - Weight Convertibles - Up to 65lbs
True Side Impact Protection™
Multi-position headrest height
No re-thread harness
Infant body positioning pillow
Patented HUGS system
LATCH bar
Harness Postion	3	adjustible positioning	4	adjustible positioning
Five-point tangle free polyester harness
Flexible LATCH
Harness Adjustment			lift lever	lift lever
Built-in lock-offs
Removable, washable cover
Dimensionsr	18.5” x 24.5” x 24”	19” x 25“ x 23.5”	19.5” x 27.5“ x 25.5”	19.5” x 27” x 25.5"

40 Pound Weight Limit Seats

The Britax Roundabout is the most basic and inexpensive Britax car seat, designed for children under 40 pounds. Its compact size makes it ideal for cars with small back seats. and push-button LATCH (lower anchor and tether for children) connectors make installation easy. The five-point harness has three different height positions, ensuring a secure and safe fit for your child. The main downside of this model is that children are likely to outgrow it and around 2-4 years old which is before you would want to move them  to a traditional booster If you have the room in your car, you may prefer a seat with a higher weight limit.

Similar to the Roundabout, The Britax Diplomat is also designed for children up to 40 pounds. The Diplomat's upgraded safety features include True Side Impact Protection, which shields the body and minimizes head movement in a collision. The headrest can be adjusted while your child is seated, which is very convenient.

65 Pound Weight Limit Seats

The Britax Marathon is a mid-weight convertible designed for children up to 65 pounds. This seat can take you all the way through to a booster seat (around the time your child is 5-7 years old), keeping children in the five-point harness longer. The Marathon is equipped with a five-point harness with four positions and a lift-lever harness adjuster. This model also features the Britax LATCH bar with individual tightening mechanisms on each, making it easier to install than the 40-pound models. This is one of my favorite Britax features.

Similar to the Marathon, the Britax Boulevard is also a mid-weight convertible car seat designed for children up to 65 pounds. The most expensive and high-tech Britax car seat, the Boulevard features a lift-lever adjustable positioning harness, True Impact Side Protection, an adjustable headrest, and a body and head pillow, making it the safest and most comfortable and versatile Britax car seat.