Looking to do -

305/45 - 22's KMC Black Slides w/ Terra Grapplers
or
285/50 - 22's KMC Black Slides w/ Terra Grapplers

both are sweet but I am just stuck on which size to go with, help?? I have a Black '11 FX4 S/C......no lift/no leveler.

 

Do u do much camping or off pavement driving? If so go with the 50 series as they will give u more sidewall. I would personally go with the 50 series as it's a 4wd. Do u like the tires sticking out of wheelwell look or tucked under the fenders? Just things to consider. Go with the 305s if u want them to stick out a bit. Obviously bs and offset will play a big role in this as well. It's Ur money so just think about what u think will look best on Ur truck.

 

You are basically comparing a 33x12.50 tire (305/45-22) to a 34x11.50 tire (285/50-22). Both will fit/look fine.