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Old 04-02-2014, 07:39 PM
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18 inch vs 17 inch

Looking to buy a set of 18inch wheels and tires(255/70/18) with 1,500 miles on them. Biggest concern is that he only has 4 rather than 5 for a spare. I have 255/75/17 on my JKU right now. Would using my old 17 inch as a spare for emergencies work?

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Old 04-02-2014, 08:40 PM   #2
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Quote:
Originally Posted by pebbles1472 View Post
Looking to buy a set of 18inch wheels and tires(255/70/18) with 1,500 miles on them. Biggest concern is that he only has 4 rather than 5 for a spare. I have 255/75/17 on my JKU right now. Would using my old 17 inch as a spare for emergencies work?
yes they are essentially the same height. It does not seem the 18 stock set up is very popular so you can probably find a spare pretty easy that matches if that is important.

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Old 04-03-2014, 01:04 AM   #3
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yes they are essentially the same height. It does not seem the 18 stock set up is very popular so you can probably find a spare pretty easy that matches if that is important.
x2

It will be fine.
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Old 04-03-2014, 01:14 AM   #4
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Why do you want 18" wheels?

They have more exposure to damage (even tall sidewalks), there are less options for tires and the tires are more expensive than 17s.
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Old 04-03-2014, 08:51 AM   #5
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"and the tires are more expensive than 17s. "

I had heard this plenty the last few years. A couple months ago I did a side-by-side price comparison of on-line retail advertised prices on identical tires, and discovered there was most often somewhere between 5-10% difference in price......which doesn't pay for a set of rims.

I'm one of those who actually prefers the OEM 18"s and even ~I~ was surprised at how close the $$$ amount was.
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Old 04-03-2014, 09:03 AM   #6
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X2. The price difference between the two isn't much anymore.

I am running 35's on 18's and they see a lot of rocks. Sure they get hit sometime but the 17's would see the same damage. The argument that they don't do well when they are aired down is ridiculous as well since I air mine down to 10-12 pounds every time we go out.

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Old 04-03-2014, 10:53 AM   #7
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The circumference difference is only -5.92%, which is close enough for a spare.
I agree with the other posts, that you would be better off to stay with 17s!
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Old 04-03-2014, 07:42 PM   #8
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You guys are over thinking this. Bottom line is a 17" and an 18" really aren't going to perform much different. This boils down mostly to looks. If the OP likes the look of an 18", so be it.

Airing down both won't make much of a difference either. If you're comparing a 15" or 16" to an 18", then there a difference. 1" really won't matter either way.
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Old 04-03-2014, 10:42 PM   #9
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I have rolled on the stock Sahara wheels with 35s and it amazing how much difference that last inch makes. Driving off road is a game of inches:

1. 2" vs 3" lift
2. 4.5" vs 5.5"offset
3. 1" lift from 10A coils
4. 1" too close to a tree
5. Tire pressure puts rim 1" too close to a rock

Every inch matters and the last inch matters the most!
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Old 04-03-2014, 10:55 PM   #10
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Great post ^^
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Old 04-03-2014, 10:56 PM   #11
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I have rolled on the stock Sahara wheels with 35s and it amazing how much difference that last inch makes. Driving off road is a game of inches:

1. 2" vs 3" lift
2. 4.5" vs 5.5"offset
3. 1" lift from 10A coils
4. 1" too close to a tree
5. Tire pressure puts rim 1" too close to a rock

Every inch matters and the last inch matters the most!
I just figure if 18" stock wheels are even being considered, he's not wheeling much. If wheeling is a priority, you want the smallest rims possible. If not, then it really doesn't matter.

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