Wednesday’s qualifying session was red flagged at about 20:20 BST following the crash, which organisers have not formally linked to the suspension.
Crowe said his sons had been travelling at more than 160mph when a crosswind destabilised the sidecar outfit shortly after they landed at Crosby Leap.
He said: “For them to escape with relatively minor injuries considering the speed – it was a miracle that they’re still here to be honest.”
Crowe suggested the incident highlighted the need for changes to sidecar regulations, arguing aerodynamic rules had failed to keep pace with modern racing.
“These rules are 30, 40 years old” and they were “not following with the times”, he argued.
Crowe said updated aerodynamic devices such as aerofoils should now be considered in order to improve safety.
