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Old 01-21-2018, 02:43 PM
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Upgrade to 18Ē?

Hi, first time poster. I have 255/75 17 on my Unlimited now. I was looking at going to 255/70 18. I know they are basically the same size but was wondering if there are any proís and conís to doing this? I like the Sahara Wheels and they only come in 18Ē that I see.
Also, does anyone know of a place to get the painted fender flares (like factory Sahara) without going through the dealer?
Thanks

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Old 01-21-2018, 02:56 PM   #2
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Lots of threads on 17 vs 18, to me going to a 18 isnít a upgrade

If your 100% street use then yes 18ís there arenít many negatives, mostly just cost of tires

If you go off-road there are negatives in addition to the added cost of the tires

I do agree, some of the Sahara wheels i like

I still went with 17ís when I replaced my hard rock wheels

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Old 01-24-2018, 12:10 PM   #3
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It depends on what you are headed with your build. Goodyear makes a Duratrac in a 285/75/18 which gets you just over 35" on a tire that fits within the Goodyear's recommended width specifications.
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Old 01-26-2018, 05:59 PM   #4
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Welcome to WF, Ouchcop!

By moving from a 17-inch wheel with 255/75R-17 size tires to an 18-inch wheel with 255/70R-18 tires, you are basically reducing the sidewall height - width and overall diameter remain the same.

Tire Size Calculator | Discount Tire Direct

That being said, reduced sidewall height (lower profile) may impact off-road performance due to less "sidewall flex". On the other hand, the lower profile tire enhances on-road handling and steering response because there is less sidewall to turn.

With that in mind, tires and tire size are a product of compromise. As others states, the right combination for you depends on your goals and what performance attributes you expect the vehicle and tires to deliver.
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Old 01-27-2018, 10:26 AM
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Thanks for all the advice. Because this is a daily driver, I canít go to extreme yet. Iím going to go with the 18Ē and thenwhen itís time for new tires, bulk up a little, maybe even a small lift. Thanks for all the help!
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