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Discussion Starter #1
I am curious to know if a feller was to add say a 1inch or 1-1/2 inch wheel spacer if that would give us better opertunity to go with a larger diameter tire without rubbing, I would love to get maybe a 34 inch tire under there without a lift kit

I do have the 2 inch leveling kit on the front as well as the add a leaf in the back that is good for an inch and a half
 

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Short answer: no. Well, maybe. Aw heck, there is no short answer.

The key to getting tall tires under these is to run tall skinny tires like a 255/80 on a stock 17" wheel with factory 33mm offset. Anyway, read on.

As far as rubbing goes, You'd be borrowing from Paul to pay Peter

Wheel spacers are like having wider wheels, or negative offset. It's going to make your tires closer to the outer edges of the fender and the body near the front of the door. Instead of rubbing sway bar or frame, you'd be rubbing fender or body

To really see what would happen, you need a helper and a tape measure. Have the helper move the wheel to lock, hold it and measure all the clearances at the tire shoulder. Check clearance and the swaybar, and inner fenders, etc. Then do the other direction. While you're doing this, you have to visualize where the wheel spacers would push the tire out to and see if you have room. Wheel spacers also push the tire out away from the pivot fulcrum which makes it travel more when you steer, Go kart tire would be the best example I can think of because of the extreme negative offsets on their wheels, when you turn a go kart wheel the tire swings rather than pivoting, it has a long wide sweep.

My wheels (18x9 with 20mm offset) are 1" wider than the factory wheels (17x8 with 33mm offset) which is nearly identical to running a 1" wheel spacer. Anyway, I was stuck running a much smaller tire than some people have reported running because of my wheel. This is due to the tire now being closer to the outer fender.

I have 2" front/ 2" rear and my max tire size on my setup was 265/65/18 which is a small 32". I'm extremely close to rubbing, and I have rubbed on occasion whipping a U turn (full lock, body roll)

Also, keep in mind not all trucks measure out same, and some sit higher or lower than others etc.

Gm made it hard to fit big tires under these things. Heck, even the bds kit and maybe the rough country lift kits include weld on steering stops to run the max tire size without rubbing

Hope this helps
 

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I just put on 34x11.5 tires. wheel spacers would definitely make the situation worse. Wider makes the turning radius wider and therefore further into the fender and bumper. Mine is a zr2
 

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Discussion Starter #4
Well I got the 2 inch spacers installed and also went with a 275.65.18 tire (32.1 tall)

They fit under there and look great, I did have to trim some plastic though
Screenshot_2017-09-26-14-29-25.png
 
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Discussion Starter #5
Today I added another 1.5 to the back to get my rake back, also put on new shocks , I bought chevy 1500 shocks, they are exactly 2 inches longer
20171002_104515.jpg
 
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Discussion Starter #6
t3.jpg
oem shock vs new chev 1500 shock........exactly 2 inches longer
 

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Discussion Starter #7
t2.jpg
 

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Discussion Starter #9
How bad was the shock swap on the long bed? Have to move the Def tanks? I did on my short bed
I installed the spacers and shocks in about 2 hours ....................shocks were easy, maybe 30 minutes, the drivers side is very close to the DEF tank however if you take the bottom shock bold out first then you can position the shock on an angle to allow the top bolt to come out above the DEF tank
 

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I installed the spacers and shocks in about 2 hours ....................shocks were easy, maybe 30 minutes, the drivers side is very close to the DEF tank however if you take the bottom shock bold out first then you can position the shock on an angle to allow the top bolt to come out above the DEF tank
Sounds a bit easier than the swb. The shock bolt comes out longways toward the tank but the bolt is about 3" long and only have an inch before you hit DEF tank. You can't even get it unthreaded and loose before you hit tank.
 

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Discussion Starter #11
The shock bolt comes out longways toward the tank but the bolt is about 3" long and only have an inch before you hit DEF tank. You can't even get it unthreaded and loose before you hit tank.
That is exactly how mine was too, but if you remove the bottom bolt first then you loosen the top bolt until it comes out of the nut then you can angle the shock so the bolt can be removed towards to top of the DEF tank
 

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Discussion Starter #12
So I'm assuming that my speedo corrected itself because of wheel speed sensors?
 

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So I'm assuming that my speedo corrected itself because of wheel speed sensors?
Negative. Speedo and odo are off now by about 5-7% not that big of a deal really

Sensors don't know because Your axles are still turning the same speed, but you are traveling further with each rotation because the tire diameter is larger.
 

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I am curious to know if a feller was to add say a 1inch or 1-1/2 inch wheel spacer if that would give us better opertunity to go with a larger diameter tire without rubbing, I would love to get maybe a 34 inch tire under there without a lift kit

I do have the 2 inch leveling kit on the front as well as the add a leaf in the back that is good for an inch and a half


So are you saying that spacers would not be a good idea,because I know plenty of people that have 30-30 inch tires and they are rubbing. They do not have spacers.
 

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Depends on where/if you are rubbing, wheel offset/backspace, wheel width, tire width, etc. there is no universal answer. You have to measure your truck to get the answer you need.
 

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Depends on where/if you are rubbing, wheel offset/backspace, wheel width, tire width, etc. there is no universal answer. You have to measure your truck to get the answer you need.

Ok, thanks!!! I will do that. That helped a lot, because I have been debating whether or not to actually do it or not. I am not sure I am willing to lift or even level my 2017 Chevy Colorado Z71. I just don't wanna spend to a ton of money.
 

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I’m running 255/75R17’s which is a 32.1x10 and have zero rub with 2 inch lift.
I installed 2 inch spacers and now have slight rub.
Not enough to stress me out but probably will trim slightly.
BTW, the spacers make the truck look way better with that wheel size.
 

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That’s a little more tire poke than my truck has, my wheels stick out 1” more than stock wheels.

Old pics for reference

C1974EA1-AAF6-4367-B881-05D77C96CB70.jpeg
EB38AD4C-F222-4A8C-8E07-53D33EBDC3D4.jpeg
 
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