To make the spice mixture combine salt, black pepper, and dried garlic.
Add one teaspoon of olive oil to the tri-tip and rub to evenly coat the meat. Add your spice mix ensuring that you get it on all sides. Let the roast warm up at room temperature.
Light your charcoal and preheat the smoker
Place your tri-tip on the smoker and close the lid. Cook until your desired temperature has been achived.
Remove the tri-tip and let it rest. After it has rested slice across the grain.