The dawes discovery twin 2117 2015 tandem bike uses the same frame geometry as the double edge and is a great for leisurely days out equipped with quality components such as the shimano acera 24 speed ez fire gears truvativ firex gigapipe cranks and 48 spoke double wall wheels with an adjustable stem front and rear as well as a pair of dawes comfort saddles you can rely on the discovery twin for both quality and comfort