Buy now a luggage bicycle trailer, foldable with a heavy duty boddom plate. This 16 inch air wheel bike trailer is connected at the rear axle to your bike.
The inner sizes are:
L: 64cm
B:43cm
H:22cm
The outer sizes are:
L 70cm
B 72cm
H 49cm
12,2 kg is the total weight, and you can carry without any big trouble more than 50kg.