Improvements for the 2007 Burley Solo: Stronger roll cage (can withstand 300lbs. of vertical force) Raised interior height by 1.5? Now compatible with same Walk and Roller stroller kit as the Burley D? Lite, Encore, and Cub The sleek-looking Burley Solo bicycle trailer offers supreme performance and luxury in one high quality, single-passenger bike trailer / jogging stroller combo . With the Burley jogging kit , the Solo can transform quickly from a bicycle trailer to a jogging stro