Thrasher's: How to Build a Tire BumpAustin shows you step by step how to upgrade a slab with a concrete tire bump. Tone, Elijah and company give it their seal of approval. Keep up with Thrasher Magazine here: http://www.thrashermagazine.com http://www.facebook.com/thrashermagazine http://www.instagram.com/thrashermag http://www.twitter.com/thrashermag