what boosters and buckets puzzle with radians?

[Pixelated]

Looking to know which boosters (narrower the better) and which infant seats (narrow also, handle up) puzzle with a FF radian. Struggling to do 3 across in a jetta wagon...thank you!

 

[gsdguenter]

I think the Key Fit is pretty narrow.

 

[canadiangie]

Look for infant seats that have straight sides along the base.

Keyfit is a good one for this.

How old is your booster rider? And your radian rider?

 

[Pixelated]

The boostered child is 6 and 48 lbs and sits very well in a booster - no concerns there. The radian is for a 3.5 year old, a small one. The radian fits really well in the car FF. Can't do it RF for the baby because there's not enough room front to back, but once the baby is older the radian goes in really well RF too.

Is the harmony literider a narrow one? Is there a high back that would fit better?