Let me apologize in advance, I know a lot of people get tired of these types of threads, but I've read and researched many and still have questions. I have a 2010 Z71 crew cab. I've finally worn my tires to a point where I can get rid of them without feeling like I'm throwing away money, and I have a bonus check coming. I know with a leveling kit you can fit 33" tires, but I need to clarify that. I know just under an inch size eg. 32.8 is usually called 33" and there are a few different size that exceed 33" eg. 33.2, 33.6, and 33.7. knowing that which is the largest I can fit (width and diameter) with stock rims under the level kit/block combo with 1/2" spacers, and the largest under the 4" lift - both with stock rims ? I like the Nitto trail grapplers 275/70/18 (33.62 diameter) will they fit level kit? I assume they will fit 4" lift I also like the BFG's 305/65/18 (12.2 wide 33.7 Diameter) will these fit with level kit ? I assume these will fit also with 4" lift I'm not opposed to some trimming, but want it within reason. Can I fit the 305/65/18's with a level kit with some trimming ? I don't do a ton of offroading, but I do some as well as some towing. any downfalls to either set up ? I know this is very specific, I'm hoping someone has experience with tires like these with these setups to let me know if they will in fact fit (other than theory). I appreciate any help.