Tri-Tip--Rub vs. Marinade?

With a large piece of meat and a Tri-tip roast being so dense and structure of meat, a marinade is pointless,it will not penetrate to the centre unless it is small roast and you let it go 2-3 days, a rub give you for a quick meal a better flavouring and crust, marinating also is for tougher cuts, if kept medium to medium well a TT can be very tender, well done is a bit chewy.

I have a friend that makes tri-tip and he marinades his for at least 2-3 days, 5 days max. But that is the best tri-tip ever. Chipolata and BBQ sauce w/ a splash of garlic. Slice thin and oh my. Works great for steak tacos or fajitas too.

I prefer marinades. They penetrate the meat more and the flavor seems to be more uniform.

Do both! Tri tip can use lots of flavor!!!

How are you cooking it? I'm going to go with dry rub.