New Wheels/Tire Width Question

[gdawg55]

I know, not another wheel/tire size thread....but I've researched myself into confusion and hoping to get some clarification.

My 1500 4x4 is leveled (with a tad of rake) with Bils set at 2.1....nothing in the rear. I have a Bighorn with stock 20x8 chrome clad wheels. I bought new wheels with -12 offset that are 17x9 (I'm kinda old school). I think my stockers are +19 offset. I also will be installing pocket flares that stick out about 2" and want to make sure the tire size (width) I select sticks out just the right amount....1.5"-1.75" from stock.

I'm looking at either Nitto Terra Grap G2 or Ridge Grap as my new tire. I'm trying to decide on the following sizes. 285/75/r17 (34"), 295/70/r17 (33"), or 305/70/r17 (34").

Here's where I get confused....how far will each tire stick out compared to stock? The +19 to -12 offset should net about a 1.22" difference, so new wheels stick out farther. I want the tires to stick out a total of about 1.5'-1.75" from stock so they are still under the new flares which will stick out about 2" (EGR pocket flares). I don't really like too wide a tire (12.5+) so I'm trying to stay in the range above. I think 34" tall is a large as I'd like to go without a proper lift.

My preference is 285/75, but I'm calculating it will stick out about 1.4" and not sure if it will be quite enough. The 305/70 will stick out about 1.8" I think? This may be too wide a look for me. The 295/70 is between the two, but it's only 33". Am I correct with my calculations? Any issues with rubbing with any of these sizes? If I'm off, please let me know what the correct numbers should be.

 

[BOWERSFJ]

Go to rimsntires.com ... They have a comparison program on their site ... Plug in stock size, and plug in your new sizes, and it tells/shows you everything you need to know


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[Dinky]

I run 17in wheel -16 offset running 11.2in wide tire and I am right at the edge of my fender with tread. It's at least a good reference for you.

this is a 285/75r17 ko2 tire

 

[gdawg55]

Go to rimsntires.com ... They have a comparison program on their site ... Plug in stock size, and plug in your new sizes, and it tells/shows you everything you need to know


Sent from my iPhone using Tapatalk

Thanks....I'll check it out.

 

[gdawg55]

I run 17in wheel -16 offset running 11.2in wide tire and I am right at the edge of my fender with tread. It's at least a good reference for you.

this is a 285/75r17 ko2 tire

View attachment 162269

View attachment 162272

Thanks Dinky.....great reference shots. I think I may need a wider tire...maybe 305/70.

 

[Dinky]

Thanks Dinky.....great reference shots. I think I may need a wider tire...maybe 305/70.

That or get some bolt on wheels spacers also..

 

[SRLMARK]

I have 305/70/17 on my stock wheels and it sticks out about 1/2 inch. Hope that helps.

 

[Triumphx]

https://tiresize.com/wheel-offset-calculator/

 

[Tim Garceau]

You’ll need a 10” wide -24 offset wheel to be flush with a pocket flare. Remember, lip to lip measurements are actually 11” for example on a 10 wide wheel. Also backspace should be considered a variable when checking inner clearance, but as long as you stay with truck wheel only options it is not a concern with 9”+ widths.

 

[gdawg55]

I have 305/70/17 on my stock wheels and it sticks out about 1/2 inch. Hope that helps.

Thanks....with -12 offset wheels this should be about 1.75" out which will be perfect.

 

[gdawg55]

You’ll need a 10” wide -24 offset wheel to be flush with a pocket flare. Remember, lip to lip measurements are actually 11” for example on a 10 wide wheel. Also backspace should be considered a variable when checking inner clearance, but as long as you stay with truck wheel only options it is not a concern with 9”+ widths.

Thanks...Tim. Good info. I'm not looking for flush...I'd like the tire to be inside flare about 1/2" or so. Sounds like the 305/70 will be just about right.

 

[gdawg55]

That or get some bolt on wheels spacers also..

Right...forgot about wheel spacers. Really don't want to use unless necessary, but thanks for the reminder.

 

[gdawg55]

I run 17in wheel -16 offset running 11.2in wide tire and I am right at the edge of my fender with tread. It's at least a good reference for you.

this is a 285/75r17 ko2 tire

View attachment 162269

View attachment 162272

Do you happen to have a side shot of your truck?

 

[Dinky]

Do you happen to have a side shot of your truck?

 

[gdawg55]

View attachment 162411

Nice...thanks. The 34" tire looks good, takes up more space than stock, but doesn't looked stuffed. I appreciate it.

 

[SRLMARK]

 

[Dinky]

Nice...thanks. The 34" tire looks good, takes up more space than stock, but doesn't looked stuffed. I appreciate it.

Yeah it looks good I think. I had 35s on 20s before and it definitely looked stuffed. I do believe going from 20s to 17s and from 35s to almost 34s made it look good with minimal change. More side wall makes it deceiving.

 

[ThunderMug95]

305 on 20x9, +18offset. No spacers or anything....

 

[gdawg55]

View attachment 162425 305 on 20x9, +18offset. No spacers or anything....

Thanks Thunder for the pic....gives good perspective with stock offset.

 

[Tim Garceau]

View attachment 162425 305 on 20x9, +18offset. No spacers or anything....

Appears like a little toe out, was that before alignment or are you on the verge of rubbing the control arm? Could just be a slightly angled shot looking at it again.