Cykell is the just click bicycle rack system from Belgium that is simple to use and is the winner of a 2014 Red Dot Award. The Extra Bike Extension allows the addition of a 3rd bike to the two bike carrier, or a 4th bike to the three bike carrier. Ideal for a child’s or road bike. Want to take another lightweight bike along? No problem! Using the just click system the Extra Bike Extension clips easily onto the outer bike rail and the supplied lockable arm securely fastens it to the adjacent bike. The Cykell Extra Bike Extension is designed to be used with the Cykell 2 Bike Carrier (T21) or the Cykell 3 Bike Carrier (T31) (Rack not included)