Dear Sir/Madam Thank you for contacting FOBO FOBO Bike 2 App have Bike's profile for 2 and 4 wheels Trailers, please click on “+” for add a bike’s profile then scroll screen from Right to Left to choose a Trailer profile according to your Trailer type,  Should you have any issue arise, you may revert to us for further assistance by writing an email to "cx@my-fobo.com" Best Regards Amir Bayati FOBO Support Team