Wheel offset

[22’s]

I am really wanting to do rims and tires on my truck and also get a wider tire under there. Been doing tons of looking and noticed a lot of people don’t go over a 285 on an 18” wheel. I’m assuming because of rubbing? Would getting a rim with the right kind of offset help? I don’t totally understand the offset. I know negative offset pushes the mounting holes back into the rim giving it a bigger “lip”. But does it also push it out away from the control arms and what not making it so you could run a wider tire? I would like to do a 295 or even a 305 tire on a 18” wheel. I’ll have a 2” rough country level. 

 

Also if you want to throw up a picture of your wheels on your truck that’d be awesome! Having a real hard time finding that right wheel and looking for ideas. Bonus if your truck is black as that’s the color of mine. 

[dcarl]

10 minutes ago, 22’s said:

I am really wanting to do rims and tires on my truck and also get a wider tire under there. Been doing tons of looking and noticed a lot of people don’t go over a 285 on an 18” wheel. I’m assuming because of rubbing? Would getting a rim with the right kind of offset help? I don’t totally understand the offset. I know negative offset pushes the mounting holes back into the rim giving it a bigger “lip”. But does it also push it out away from the control arms and what not making it so you could run a wider tire? I would like to do a 295 or even a 305 tire on a 18” wheel. I’ll have a 2” rough country level. 

 

Also if you want to throw up a picture of your wheels on your truck that’d be awesome! Having a real hard time finding that right wheel and looking for ideas. Bonus if your truck is black as that’s the color of mine. 

Visit CustomOffsets.com for the best explanation of rim offset and backspacing.  You can also see in their gallery what other people have run by tire /wheel size and lift.

[22’s]

On 3/8/2019 at 3:44 PM, dcarl said:

Visit CustomOffsets.com for the best explanation of rim offset and backspacing.  You can also see in their gallery what other people have run by tire /wheel size and lift.

I’ve spent a ton of time combing through custom offsets gallery and it has done pretty much nothing. Some people say a wheel and tire set up with a -20 offset with a 33x12.5 tire has no rubbing and needs no trimming while the next person down with the exact same set up says it rubs and needs major metal trimming. The people posting to the gallery are very inconsistent leading a uneducated person down a dead road. Also I have found that, let’s say a 20x10 wheel with a positive offset with a 33x12.5 tire fits with no rubbing or trimming, but the same setup with a negative offset rubs and needs trimming? How does that even work?

[dcarl]

Well the primary reason for pointing the was the explanation of of offset and backspace.

I can tell you that I run a LT285/60R20 on stock GMC All Terrain wheels with 2.5" lift and 1.5" body lift. My tires rub the sway bar and just barely touch the upper control arm.

I've got a set of 1" Bora Wheel Adapters to go on when I put on my coilovers with new upper control arms.

275 is about the only width guaranteed not to rub but it is dependent on the wheel choice.

I've seen where a zero offset is a pretty good choice for keeping the tire about even or just outside the fender.

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[kennerz]

I've found everyone has a different tolerance and opinion as to what's an acceptable level of rubbing

Zero offset means a centered wheel. positive offset places the mounting point towards the outside of the wheel pulling them inward

 Negative offset places the wheel mounting inward of the center and pushes the wheel outward.       I'm running a -25 on a 10 wide

 Using a 33x12.50. Rubbed enough not to get full wheel movement lock to lock

Trimmed plastic first and it got better

 But still not good imho

Just did the zone trim plates and modded some other areas some (essentially a norcal).

 Now I have only minor barely audible rubbing only at full lock in reverse and is a non issue. Otherwise no rubbing and have full movement.  A zero offset will place the wheel in the wheel well where you will have minimal rubbing.

 A factory positive with a wider wheel  will run the control arm

 

 The positive offset will rub at the back of the wheel well. A 12 wide positive offset rim will take major mods and a significant lift

Also takes .more than just a lift or level to make it work.  I would go into this expecting to rub and come up with a modification plan to make it work

Anything can be done just how much are you willing to do to get there. The norcal was not that bad And is hardly noticeable. Figure out what you want and do it...