Dahon engineers are some of the best in the business but there are few people who know hand-made steel frames like Tom Ritchey, one of the most respected names in the business. That's why we licensed Ritchey's BAB technology and worked together to develop steel road and mountain frames. Ritchey's BAB technology allows a frame to be disassembled into two sections for more compact packing, yet it has absolutely no effect on performance, adds only 98 grams, and is virtually invisible. Frames using Ritchey's BAB technology disassemble in 10-15 minutes to fit into a small suitcase measuring only 23 x 68 x 78 cm (9” x 27” x 31”).