If you have the BusBiker installed at a dealer of BusBiker Europe, you also pay on the day of installation at the relevant installation partner.
With them you can coordinate the specifics for mounting the BusBiker and any additional options such as 3rd rails and ramp etc.
Each installation partner will be happy to inform you about the payment options such as cash and / or pin payment, etc., ask for it when you make an appointment.

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