New and improved family bike
We ditched the Marin frame and got a nice Trek that we're thrilled with. This means that the wheel size is 26", which is what the xtracycle is designed for (you can attach it to 70cm bike, but with 26" you get a slightly lower center of gravity, which is nice). It was quite a search finding a 26" frame without hard core shocks on the fork though, but we finally have a bike that doesn't bottom out on small hills and around turns, and generally fits us better.
We've also added padding (little butts thank us).