I bought a 2003 4 wheel drive screw used a couple of months ago. It had a set of 20" wheels and p275/60R20 tires on it and they look great. I installed nurfs on it but am getting tired of hauling my butt up and into it. Would the stock 16" rims or optional 17" rims help with lowering the truck a bit? If so, can you tell me how much?

 

No, not unless you install a really short tire on the wheels. I'd just lower the truck.