Xtracycle add-on model isn't that expensive. Last I knew - like $169. I have friends that use trailers from http://bikesatwork.com/ http://bikesatwork.com/ V

Xtracycle add-on model isn't that expensive. Last I knew - like $169. I have friends that use trailers from http://bikesatwork.com/ http://bikesatwork.com/ Very inexpensive. Easily attached, and you can use your bike regularly whenever you want.