Anyone Running 305/55R20

[davez71offroad]

IM currently looking at putting new tires on the Tahoe and im between 305/55R20 and 285/55R20 tires on an SS silverado rim 20x8.5. Which ones would fit with a front leveling kit on a 07 Z71 Tahoe? Minor trimming is fine. Any pics of setups would be great. Thanks for the help. I am open to puuting spacers in that back if that helps fit the tires.

 

[InTruckDesign]

I am running them in a Nitto terra grappler, you may only have minor trimming if you keep the backspacing/offset as close to factory as possible. I have aftermarket wheels that are -18 offset with 4.5bs, I have the CCM 2.5"/1"(fr/rr) and had to do some minor to major trimming...all depends what your definiton of trimming is!?!?!?! I did trim some of the metal pinch weld behind the wheelwell liner on the back of the front tire area.

 

[davez71offroad]

The tires will be going on the Silverado SS rims. I have beend oing some research on the tires and some ppl are clearing them as i see you are. Im fine with trimming the plastic. I have already pulled the front air dam off. Can you get any pics of you wheelwells and the trimming you did?

 

[07warwagon]

I have 305/55/20 Nitto Trail Grapplers on my Burban with a Rancho 4" lift and trimmed some of the plastic wheel liner in the front driver and passanger wheel wells.

 

[davez71offroad]

Finally got everything installed and ended up going with CCM leveling kit and 305/55R20 BF Goodrich Tires.

 

[Mr. B]

Is the CCM kit just a front level, or does it raise the back as well?

 

[Zed 71]

Dave looks good. I wonder why you had less triming (a lot) compared to InTruck? I wonder what the offset difference is.

Mr. B the CCM kit raises the rear as well. On mine the rear was ~0.25" higher, barely noticable.

 

[davez71offroad]

Zed, I had trimmed some when I had my old tires on the truck so that is probably the reason but i will say that th offset on the rims is perfect for this setup. Both the front and the rear are sitting at 40 inches.

Has anyone had the stablitrac light or the ABS light come on after installing the leveling kit and tires cause mine come on when I got home last night.

---------- Post added at 02:20 PM ---------- Previous post was at 02:18 PM ----------

IN Truck, Did you have problems with your Stablitrack and ABS lights when you went to those size tires cause I have almost the same setup as you and both lights are flashing?

 

[Zed 71]

I have had no problems with the lights. Might be a sensor connection issue located at the front struts. Check those first. Also check if the tires rub any wire harness at full lock. That has been an issue for a few folks.

 

[TREYR8D]

Dave, ur truck looks friggin awesome!

I'm also in between the 305/55 R20s and 285/55 R20s. I've been leaning towards the 285s for a couple reasons.
1) i heard the fuel milage will take a noticable hit with the wider tires, can you give any insight to this?
2) the required trimming would be less since the actuall sizes are 305=>33.19" and the 285=>32.28" for the Nitto TGs. BFG lists yours as 33.4"
3) I really didnt want the tires to stick out past the fenders. Wheels i'd get are +18 offset w/ 5.75 BS, i think stock GMs are around +35 which is maybe 5.6" BS (maybe someone knows for sure). how close are your tires to being flush with the fenders?

All in all considered, the 305s i think would look better, so if my thinking is wrong on those three points, i'd want to go with the 305s. Funny thing is, i think they're actually $20 cheaper/tire. Probably because of the load range rating difference.

Thanks