Sun Bicycles 7-speed and Disc Brake Trike Conversion Kit Intended for use on the Sun Bicycles 24" Traditional Trike 2016 or newer with updated derailleur tab and brake mount on rear unit Sunrace 7-speed twist shifter, direct-mount derailleur, and freewheel with 15mm trike adapter Promax mechanical dis brake caliper and 160mm stainless steel rotor with 15mm trike axle adapter 1/2 x 3/32" chainwheel All components necessary for upgrade such as zip ties, axle keys, new grips, and other small parts are included