Here's the reply I got from the black gold natural tiger skateboard company, as to why my decks were 8 inches (and I measured them) instead of 7'' 3/4;
Hi,
The boards are professionally made to the specification of 7 3/4”. They are measured edge to edge from the middle of the edge to the middle of the edge in straight line.
Also, high moisture and heat in the air affect the natural fiber of the wood which expands.
Sincerely,
Steven