Just a little info to re-affirm what some guys on here have already talked about. I saw a guy I know the other night who has a 2007 crew cab nnbs, same truck as mine but a year older. He has the Rough country 5" with 295/65/18 Duratracs. I have the Rancho 4" with 275/70/18 Duratracs. His front fender measurements are 42 1/4. Mine are 43 1/4. Now my tires are supposedly about one tenth of an inch taller, but this gives you an idea of the difference between the two kits.