305/65r18 (33.4/12.3r18)

[scoobyxj]

What's the consensus on these fitting with just leveling? http://falkentire.com/tires/truck-suv-tires/wildpeak/t-tire?ModPagespeed=noscript

I'm not really sure of my wheel back spacing.

 

[YukonXL04]

Which wheels? Cause its gonna depend on backspacing. If your truck is 2wd then get 3 inch spindles up front and they should fit. But just keys and I'm pretty sure they wont.

 

[scoobyxj]

It's a 4x4 and a Z71. Not sure on the wheels. I bought them second hand. That's why I don't know the backspacing, and I've sent them off to be blasted, and repainted so I can't easily measure them at the moment. I think I'm going to call the tire shop in the AM, and tell them to get me the 275/70R18 instead. That's a 33.2/11R15, and seams to be a more common size (in other rim sizes) for the leveling crowd. I could do a body lift on top of the level though. Looks like it'd only add about $350 to the whole thing.

 

[YukonXL04]

I have 265/75r18 on mine. No rubbing at all. And yours sits a little taller. My wheels have +25bs.

 

[scoobyxj]

Yeah yours are just a bit taller but the 305/65s where quite a bit wider. I was more worried about the width causing issues than the hight. Like I said I don't know the back spacing on my wheels so figured I'd better play it safe and slim them up a bit.


265/75-18 305/65-18 Difference
Diameter inches (mm) 33.65 (854.7) 33.61 (853.7) -0.04 (-1) -0.1%
Width inches (mm) 10.43 (265) 12.01 (305) 1.57 (40) 15.1%

Here's what I ended up going with compared to yours.


265/75-18 275/70-18 Difference
Diameter inches (mm) 33.65 (854.7) 33.16 (842.2) -0.49 (-12.5) -1.5%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%

 

[YukonXL04]

Hmm... maybe I'm wrong on mine. I don't think they are 33. Maybe they are 275/65r18 lol... my bad. Those numbers jumble together after a couple years haha. But yea it's definitely the 12+ width that will cause issues. On my setup at my width I can fit a slightly larger. Ie 33 tall. But I think the width starts having issues too. Do you know if your current wheels/tires stick out past the fendeier? My tires are dead even with my fender.

After looking at your numbers, mine are definitely 275/65. Cause when I buy new tires I was looking at 275/70 and I'm pretty sure they will fit on mine as is. May have to crank the keys to level it though, either way they will fit mine with just a level and I'm a 2wd, so your z71 sits a little taller I believe. So you should be good. Sorry for the mix up.

 

[ryanben81]

So will 275 70 18 fit on a stock 06 z71 or do I need to level it? Looking at the bfg at ko2

 

[YukonXL04]

I think you will have to crank the keys at a minimum.

 

[scoobyxj]

I'd say you're in the ballpark with that size. They're a little shorter than what I'm going with, but also just a bit wider. I got my keys cranked up today, and I'm setting roughly around 37+ in on each corner measured at the bottom of the fender (although it may settle a bit once I move it).
Diameter inches
265/75R18 = 33.65 (854.7)
275/70R18 = 33.16 (842.2)

Width inches
265/75R18 = 10.43 (265)
275/70R18 = 10.83 (275)


As far as an update to what I'm dealing with. I couldn't find anyone to remove the chrome off the aftermarket wheels I had so I hit up Craigslist for something else, and found a set of 2013 18in take offs for $300. They're getting media blasted and painted, and hoping they'll be done later today (it's Friday already here) so I can get the tires mounted and on it. Hopefully I'll have some pics, and some final hight measurements by this evening.

 

[ryanben81]

Got the 265 75 18 bfg at ko2. Looks great and rubs a little at full crank. Looking into leveling it out.

 

[YukonXL04]

I just bought new 275/65r18 cooper's and they don't rub at all. But moving to a larger tire increased the cost significantly so I just stuck with the same size.

 

[scoobyxj]

Sorry forgot to post them up, but here are a few pics of how it turned out.