The dawes duet twim 2013 2015 tandem bike is a great value tandem created by dawes especially for those wanting to get a taste of tandem life featuring the latest design alloy frame which gives improved standover height without compromising rigidity equipped with 21 speed shimano revoshift gears and tektro alloy v brakes all sizes are fitted with a rear rack to give you the option of carrying luggage as well as mudguards to help keep you dry