Generally from the materials. A fake skateboard (one from like walmart or most sporting goods stores) is made from plastic or low quality wood. The wheels also may also be plastic, if it's like 50$...
The way you can tell that a skateboard is fake is that if it doesnt have grip tape (the black rough-smooth part). Also if it has pictures on both sides of the board. And if the picture or design is...
they are real because they are made from by nhs fun factory which makes other big companies like flip,creature,indys,santa cruz etc.AND they are made from 100% professional quality maple! which PROS...