Im not a total idiot on the subject but when it gets to tire size and off sets I dont really know whats going on. Im looking at getting Velocity motoring v710s, on the website it says 19x8.5 ET35 for the front and 19x10 ET38 for the rear, I get that 19 is the wheel size and 8.5 is how wide it is but, whats "ET35 ET38" and since the wheel is 8.5 inches wide will the tire be 8.5 inches wide also? or would it be wider? Tire size is also a question mark for me I see 285, 275 stuff like that getting thrown around but dont get what it means, can some one shine some light on this for me?