I've got a few easy questions. It is time to upgrade my rims and tires.

I've been looking at the black rock crawler rims from 4 wheel parts. I'm not sure what the big difference is between the 15x8 or 15x10?
And they also have the Street lock rims. Are these only made for street use, or will they work for offroad applications. I will only be running 33's maybe 35's in the future.

Last question: I'm looking at the Pro Comp Mud Terrain Tires or the X Terrain Tires or the Super Swamper TSL's. Which one works better all around, mud, snow, and rocks? Which might last longer?

with up to a 13inch wide tire i would run a 8inch wide rim. you will get a better tire contact patch at road pressures and better bead retention at trail pressures.

"street locks" are a joke. they are nothing more than a steel decoration ring welded onto a wheel to give the illusion of actual beadlocks :D
dont bother with them,get real beadlocks if you need them for your use

of the 3 tires you listed for your aplication i would say the X terrain. as they will work well for all the choices and they have good road manners.

the Mud terrains are ok as mud terrains go, and the TSLs will not be a street friendly tire and wear quicker but excell off road

if you go tsl's run a 15x10" rim it looks better & it gives you a wider stance & on my 1 jeep I could air down to 5 psi on 15x10" rims with boggers 33x14x15 & for the street locks don't get them if you want the black wheels call NTW they are like $55 a piece or so 1-800-847-3287 & get you some steel eatons