They fit with stock suspension. They have about 1/2" to spare from rubbing the fender well in the rearat about half-turn. I intend to install a RC leveling kit anyway. They provide a little higher ride, but no noticeable handling difference. I guess that's because the contact patch is bigger. Gas mileage seams a little worse right off the bat, especially around town. But it's probably not as bad as it reports because the tires are turning a little slower than the sensor is aware of at highway speeds.

 

I have been looking at those same tires as a replacement for the stock ones on my 2500HD. They have a very high load rating of 3750@80 which is the highest rating I have found for any 17 or 18 inch tires. I am surprised that they rub as they are only 1/2" wider than the stock tires which means they extend only 0.25" past the center-line of the rim.

The are nearly 4% larger in diameter than the stock tires so without 3.73 or lower gearing your engine may be working harder around town. It will also may a slight impact on your odometer readings which will be low by about the same 4%.

Tire squirm and the added weight will hurt gas mileage and if you have a light truck the tires are not going to be anywhere near 80 PSI and you will get a lot more sidewall flexing which also reduces fuel mileage.

 

They don't rub, but they are larger diameter. I replaced 265's with these. I have the 3.73 rear. But I can still tell a difference in low end power. Thanks for the info.

 

I own 2008 silverado crew cab...Wanting to put 22" rockstar XD on 33" Nitto Terra Grapplers...Has anyone seen that around or have pictures so i can have idea of what it looks like?

 

hey man ive got 20in Gear Recoils on my 2010 Silverado HD with Terra Grapplers on them. I like the rockstars but wanted something different for mine but i have pics of my truck with them so you can see what some 20s look like on mine.

 

I'm running the Terra Grapplers :
265/65/17 on 17" MB Stryker Wheels - 2005 Silverado 1500 Ext Cab 4x2
305/70/17 On 17" XD's - 2009 Silverado 1500 LT Crew Cab Z-71 with 6 inch FabTech lift.
Tires ride great on both trucks. Which usually means a short life span. I've been told that they do wear quick. especially on the heavier trucks.

 

This is so true. I love the ride they give my 2500hd but they wear faster than i thought. Gravel is rough on them for sure. I have 33k on them and they are at 50 but one of them is at 25% cause it rubbed really bad on the front for some reason so i am looking to replace them but will probably go with the same tire. I kinda want to run dune grapplers but idk if they would look good on my truck or not.