2012 GMC 4" Rancho Wheel & Tire Questions

c0d39177 · April 5, 2012

So I have gone ahead and ordered a 2012 GMC Sierra SLT Crew Cab at my local dealer in MN. I am going to be installing a Rancho 4" Lift Kit as soon as the truck is delivered. 4wheelparts.com gave me a smoking deal by the way! Now for the main question, I have settled on a 20x9 wheel, but have questions/concerns on the correct offset as well as the correct tire size to coordinate with the offset I choose. My choice is either +18 or +30, from what I know, +30 is pretty much stock offset, +18 will stick the wheels out a little bit. I do not want to run any fender flares, would +18 stick the wheels/tires out too far if I dont? Then depending on offset, what tire size would work? Looking at Nitto Trail Grapplers M/T, I have been told a 295 60 R20? I'm concerned that my be too big and rub, would a 305 55 R20 be better? Any and all help/comments is appreciated! Thanks

By the way, anyone know of a good shop to install my Lift kit in MN? The 3 shops I have called want $725, $825 and $1000. That seems a little excessive to me.

cparks555 · April 5, 2012

Hey man, you're going to love the Rancho lift. I'd reccomend +18 offset wheels and 33x12.50's, that was I had untill yesterday and never had any problems. I rubbed a smidge in reverse at full lock only on the drivers side, looked killer and didn't really lose too much power.

This will give you an idea of what a +18 offset wheel and 33x12.50's will look like with the 4" Rancho.

c0d39177 · April 5, 2012

So would the 305 55 R20 be the closest to the 33x12.5. Reason I ask is on the Nitto site in a 20" I do not see the 33x12.5 20. Thanks.

cparks555 · April 5, 2012

Yes, those would look fantastic. Mine rubbed the plastic in front of the tire so little i didn't ever trim it, in the back of the whel well near the cab was plenty of room.

c0d39177 · April 6, 2012

Your Truck looks SWEET! Thanks for the info. and pics. +18 with 305 55 R20, thats the winner! Thanks again!

c0d39177 · May 12, 2012

Looking for a little more help again. I was wondering if anyone might have a good suugestion as to some pricing info. for the Rancho 4' kit on a 2012 GMC Sierra SLT CC? I thought 4wehhelparts.com was cheap @ $1975.00 delivered with shocks (900XL). However, I recently checked Amazon.com and found I could get the complete kit for approx. $1750.00 delivered. Anyone else know of a good location to order from, that is authorized as well, I do want to make sure I am eligible for the $500 rebate from Rancho too? Thanks again guys!

ruggedlife · May 13, 2012

go to your local truck shop, ask them how much see if they price match the price shipped to your door. support the little guy not the big internet site. they might not make their normal mark up trying to price match but five dollars is better than no dollars, plus you'll have someone in person to deal with in case of any issues

c0d39177 · May 13, 2012

Well, that is usually what I try to do, however, every shop I have called tells me to buy it! That is cheaper than their cost, there is no way for them to even come close! And we are talking at least a $800+ difference, so unfortunately its not a question of $100 to support my local shop.