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Old 05-20-2015, 10:45 PM
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20 inch vs 18 Off Road

Are the 20 inches totally useless when off-roading? I see a stock overland w/ quadra drive but has 20's on it. Debating about pulling the trigger vs. custom order.

I would have to put the skid plates on too. Don't really want to have to buy different tires - and I know there aren't really off road options in the 20 inch size - but that may change over time right?

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Old 05-20-2015, 10:57 PM
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Re: 20 inch vs 18 Off Road

I think if you want to put off-road tires on, 18" rim is a better bet as 20" tire choice is limited and I don't think there is an off-road tires offer on the 20".


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Old 05-20-2015, 11:14 PM
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Re: 20 inch vs 18 Off Road

Cooper LTZ and Nitto terra grapplers are possibilities. I have heard of owners hitting rocks and tree roots on tracks and damaging their rims with the 20s and original khumos. But other than that they will get you around.

If you are going anywhere that would damage the 20s, then you'd want to go 18s with an LT construction tyre for the stronger sidewalls. Really depends how far you plan to go.
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Old 05-20-2015, 11:20 PM
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Re: 20 inch vs 18 Off Road

depends on what your idea is of offroad, anything more than a fire trail or dirt road and you would want to reduce the rim size. think of it this way the larger the tire sidewall the more traction you will gain plus a more comfortable ride. the tires also aid in absorbing all shock from the road surface.
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Old 05-21-2015, 01:30 AM
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Re: 20 inch vs 18 Off Road

There are advantages and disadvantages for each. You can do quite a bit off road with 20s, but yes with 18s you have more capacity for flotation. But with 20s I get better handling and steering response.
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Old 05-21-2015, 02:28 AM
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Re: 20 inch vs 18 Off Road

you cant be serious better handling off road with 20's sorry what have i been missing in my past 4x4 life?

i guess that pretty much sums up my first response in peoples views/opinions of what off road actually is!!
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Old 05-21-2015, 04:40 AM
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Re: 20 inch vs 18 Off Road

He said better handling and steering response, he did not mention off-road and I sure was referring to the on road performance.
As for 20 inch wheels I run 275/55/20 which has quite a bit more sidewall than the std tyre. The tyre is the Nitto terra grappler also the Cooper LTZ is a pretty impressive tyre from what I have seen. U can also run 285/50/20 which fit alright.


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Old 05-21-2015, 06:10 AM
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Re: 20 inch vs 18 Off Road

Wasnt the op questioning offroad capabilities? Not on hwy performance of which is a no brainer? You will never beat the ride or traction a 15 or 16inch tire gives on a real 4x4. Yes there are options in our sizes but we drive a slightly more onroad biased pretend 4x4
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Old 05-21-2015, 06:47 AM
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If you are not going real extreme and decide to go with the 20s you can also buy the mopar rim policy its only $310 and gives you $1500 worth of bent rims per year for 7 years. After bending the 2nd $640 rim in 1 year i finally got smart and bought it. It applies to after market rims also they dont have to be stock but needs to be done at jeep dealer if i remember right.
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Old 05-21-2015, 09:39 AM
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Re: 20 inch vs 18 Off Road

I agree with the majority here and say offroading (depending on difficulty) is best left to smaller diameter wheels with bigger tires. Depending on the offroading you are doing, you will most likely want to air-down your tires and you can't really do that unless you have a decent amount of sidewall.

However, There are a number of Offroad tires for 20" wheels out there. When I frequented the wrangler forums there were several guys who ran 20" wheels with big offroad tires. They are out there. You just have to find them.

The stock 20" wheels and tires should be fine for mild offroading. If you are thinking of adding skidplates and things of that nature then you are probably interested in something more difficult than mild so you may want to just opt for a set of 18" wheels/tires for that stuff and keep the 20" wheels for the street. You also might want to do a lift as well. Two sets of wheels is the best option.
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Old 05-22-2015, 07:03 AM
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Re: 20 inch vs 18 Off Road

is it a new Jeep? I have a brand new limited with less than 300 miles on the 18s and would switch with you/
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Old 05-22-2015, 07:39 AM
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Re: 20 inch vs 18 Off Road

I have a set of 18's for offroad and a set of 20's for on road. Get the ORA pack, then you can pickup a set of 20's on ebay relatively cheaply. The biggest difference offroad was going to 32 inch tyres. I will be putting 32's on the 20inch rims when the Kumhos wear out.
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