The problem is she can not yet sit by herself (needs side support). I also have to maneuver within a city traffic and curbs, so these things become quite dangerous. As for 40lb, I already have the seat bolted to the tack. Not a chance of it coming off!
>>go with the Trail-a-bike option. Many of those seats are only rated to hold 40 pounds of kid and you >>certainly don't want it coming off the rack whilst riding.
Yes, this can be an issue, but my bike frame is quite tall, so with careful foot rest positioning I should be able to clear her toes for a while.
>>Also, if you let her legs down further, won't they be in the way of you pedaling??