Realisticly, how old can I harness in the Radian?

[Sonneva]

My daughter will be 4 in Feb. she is currently 38.5" tall and 34 lbs. She is in a Radian and my son is rearfacing in a Marathon. We are going from a van to a 5 passenger vehicle and need to be able to have a third person in the backseat between the carseats (an adult). Originally, we were going to pass the Radian to my son and get my daughter the Graco nautilus or Britax Frontier, however, we now have a space issue. Are there any seats other than the Radian (in Canada) that are narrower than the marathon (harness to booster?). If not, how long would a Radian be likely to fit her harnessed? We are thinking, at this point, that it may be our only option. I would like to keep her harnessed as long as possible.

Thanks!

[Maedze]

Most kids fit to 6-7 harnessed in a Radian.  

[chickabiddy]

If the Evenflo Maestro is available in Canada (sorry, I don't know if it is), it has harness slots a good inch taller than the Radian and it's fairly narrow.

[Boot]

Originally Posted by chickabiddy 

If the Evenflo Maestro is available in Canada (sorry, I don't know if it is), it has harness slots a good inch taller than the Radian and it's fairly narrow.

The Maestro only harnesses to 47lb in Canada. 

[chickabiddy]

A 34# 4yo will probably make it to a safe booster size/age in a 47# seat, though.

[Maedze]

Originally Posted by chickabiddy 

A 34# 4yo will probably make it to a safe booster size/age in a 47# seat, though.

Yup!

[rik8144]

My almost 6 year old weighs 48 pounds and is still harnessed in a radian in DHs car. She also fits wonderfully in the frontier in my car. She is about 1-1.5 cms away from being out of the radian harness. She is also fairly tall for her age (96%).

[Just1More]

My almost 7yo is 51" and 55lbs and is just now done with her radian.  I'm ordering a HBB in the next day or two for her.

[broodymama]

DS1 was about 6.5 years old and ~50 lbs when he moved out of his Radian 65.  He still fit in it by height technically (since they say shoulders can be above top strap height in the Radian), but we went ahead and moved him to a HBB not long after his shoulders went above the top strap height.

DD1 is 5.5 years old and still has another 1.5-2 years, at least, in the Radian.  She's more petite than DS1.

[Sonneva]

Thanks for all the responses! She is in the 15th percentile, so it looks like she may be able to make it to 7 in the Radian, which is what we were hoping. Then we can transfer her into a narrow highback booster.

The maestro will be too wide to have an adult in the backseat, so sadly that wont work.

Thanks again!