My wife and I are looking for an Adams Ultimate Tandem to tow two kids ages 8 and 9. They are to big for the trailer and can't keep up when we really want to ride. They ride their own bikes on sunday afternoon leisure rides. I saw a picture of teh Ultimate Tandem but can't find information on it. If anyone has one for sale or has othe suggestions that I am unaware of please help us out. Thanks, Michael