Ive got 20 all around on my truck, ive never got messed with it. I had 15 on the front, and 5 on the back in my old lifted 4runner and never got bothered about it, and my tires were louder than piss (pro comp xterrains are the loudest tires on the market). Being a truck I really dont get hasseled anyway, if I do its rare. But if your worried about it, get 35 and definately get a 5 percent strip. That strip makes all the difference. If that doesnt please you, Get 35 and get someone to lightly tint your winshield. The guy who did my tint has his done, he has 35 all around and a 50 percent on his winsheld and it looks like 20 maybe even 15 without the sunlight. It is very illegal but honestly I couldnt tell the winshield was tinted, I didnt belive it was 35 all the way around because it was too dark and it only made sense when he told me about the winshield. If you are looking for someone to do it PM me and Ill give you a number