diff --git a/4.1.-op-request=booking_request.md b/4.1.-op-request=booking_request.md
index 963b2d7..c2b22cf 100644
--- a/4.1.-op-request=booking_request.md
+++ b/4.1.-op-request=booking_request.md
@@ -110,6 +110,14 @@ https://shareeapp-fr01.copri-bike.de/APIjsonserver?request=booking_request&bike=
                "longitude" : "7.825490",
                "latitude" : "47.976634"
             },
+            "bike_type" : {
+               "category" : "cargo",
+               "engine" : {
+                  "manufacturer" : "dummy"
+               },
+               "wheels" : "2"
+            }
+          },
           "rental_description" : {
                "tarif_elements" : {
                   "1" : [