Originally Posted by brons2

I answered my own question, the Rondo does fit our Burley but you have to lay the front passenger seat flat and put the rear wheel in first. Ends up with the rear wheel right over the front passenger seat. The wifey had to sit behind me on the side of the back seat that wasn't folded forward.

It might be possible to get the bike down the center with a smaller tandem. There just wasn't enough headroom with our bike, an XL model.