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-27 mm or -38mm

bobwhite

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I'm looking to upgrade to mud terrains. I do not want to use spacers. I'm going with 30-10.5-15 or 31-11.5-15. I believe these need a 15x8 rim. The biggest offset I am finding with those are -27 mm offset which is 1.06 inches. The -38 mm is 1.49 inches. Do you think I can get away with the 15x8 with the -27 mm with no rubbing? I have found some -38 mm, but they are 15 x 10 rims. The Wheel Group 171-5885P: Ion 171 Series Wheel Size: 15" x 8" | JEGS This is the wheel I am looking at. Good price and on sale for the next 2 days.
 

Cloud

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For the 10.50s you could do a 7 inch wide wheel. You should go 8 wide for the 11.50s 8 wide would be fine for both. (Tire width x 0.66)

Stock wheels are 16x7 with a 29x10.50 tire.

1 inch is 25.4mm

If you go with an 8 inch wide wheel and 0 offset, your inner surface is 13mm (12.7) closer to the engine bay. Therefore a -13mm offset clears the same as stock with a stock width (10.50) tire.

11.50 width tire pushes the rubber 13mm (12.7) closer to the engine bay.

Combine the two changes and you need a 26mm offset to match stock clearance.

Be sure to check the actual width of the tire. My 35x12.50s on my Toyota are 13" wide and I do not know the actual width of the stock tires. The stock tires are said to be too close without a little adjustment, I believe to the steering knuckle.


The best I've found with a108mm (107.95) hub bore was -20mm offset raceline rock crushers so I'll take a look at these. I'm looking for wheel/tire combo as well.

Can we run 15s? This is a great wheel choice if so.

After looking at the numbers and considering that I would like to run a 33x10 tire, I think the best choice for me is Raceline Rock Crusher Wheel Polished Aluminum 16x8 5x5.5" ( 5x139.7 ) -20mm

If I did the math right this would out me .5" further from the engine. Wish it was 16x7 though
 
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bobwhite

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Yep, others have run the 15 inch rims. I went ahead and bought them. I figure with the offset that I'll be ok. Leaning toward 31-10.5-15 tires. Thanks for your reply.
 

Cloud

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What year is your machine?
 

Cloud

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2020 bought it yesterday
 

bobwhite

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I'm looking at mastercraft mud terrains. Mainly because the tire shop i go to sells them. I drive mine on the road a lot as well. Have it plated here in Michigan. Didn't want to go super aggressive because of that.
 
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