this is an extreme example.but helps one get the picture.
during my dump body build,i ran out of bolts to bolt down my plywood on the front of my bed.
i bolted the top,and threw my spare 16" fully inflated truck tire behind the sheet of plywood to keep it from blowing backwards on my trip to the hardware store.
@ 15 MPH leaving town,the wind blew back the sheet of plywood,sliding my big heavy tire,which is sitting(laying down of course) on dry rough sawed lumber,like it wasn't even there.
i had to turn around,remove the plywood,so i could go to town for the bolts.
there was no wind that day.
(i didn't have the sides on yet,to hold it.)