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Old 22-11-2016
Galvo  Galvo is offline
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Default 20's to 18's?

Hi all,

Iíve got 20 inch rims on my GC and was looking at getting some new 18 inch rims when my current tyres need replacing. Has anyone gone from 20 to 18 and can you tell me if you noticed a difference in the way the car handles. I realise the 18s can be deflated more than 20s and therefore a better off road size but what about driving around town Ė does the car roll more or possibly skip less etc, is towing affected?

Also, what tyre size should I look at so as not to throw the speedo out, Iíve noticed some run 265/60/18 while others 265/65/18. Iím assuming 265 is the width therefore no speedo difference but 60 or 65 is a difference that could have an impact?

Cheers, Brett
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Old 22-11-2016
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Hi Brett,

We also have the 18s (car came with 20s). They are great for towing - better to have a bit more rubber under you! They do feel a tad softer on the road than the 20s.

Have not noticed any speed o difference - we use the standard 65 size. Also the TPMS works perfectly if you get another set on your 18s.

Yes, much better offroad - that is where the main benefit is.

No extra roll or skipping - both track nicely, but as I said, the ride is softer on the 18s and we like them for towing and offroad. Plus having two sets of wheels/tyres, the rubber will last forever!

Cheers,
Sally
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Old 22-11-2016
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Thanks Sal.
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Old 22-11-2016
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Yep, agree with Sal. I purchased a set of 18" from a WK1 with plenty of rubber off Gumtree. Liked them so much I havent put the 20" back on.
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Old 24-11-2016
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Good to hear CC - now just gotta pick some rims and tyres!
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Old 24-03-2017
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Just took delivery of a set of 18" standard GC rims in gun metal grey with Cooper AT3's 265/60R18 for off-road use so I can keep the 20s for the blacktop on the GC Overland WK2. I will test them out over Easter in the Gawler Ranges at Mt Ives Station. Spent a long weekend a couple of weeks ago sand driving along the Coorong with the 20s and they performed really well. The low profile road tyres ballooned well but I only let them down to 20 psi as I wasn't sure how the side walls would go if lowered too much. Didn't get stuck at all even after the others had churned the soft sections before me. The GC diesel is so sure footed.

I had originally kept a set of 17" x 7 standard jku wrangler rims with Mickey Thompson mths 285/70R17 tyres as the stealership and a US website said they would fit on the GC but when I tried the rears went on beautifully but not on the front with the bigger discs and protruding calipers.

So now I have 18's and will put the 17's up for sale rims and tyres with 10mm tread left.

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Old 26-03-2017
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I've gone up to 275/65R18, the speedo is almost dead on now, maybe 1-2kph over at 100kph. My tyres have a diameter of 818mm, so anything around 810 or smaller the speedo should be ok.
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Old 26-03-2017
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I had the 20" wheels and tyres swapped out by the dealer before delivery of my WK2 and don't really know how the vehicle performs with 20's.

I once drove a Discovery with 18" wheels and the ride was so much harsher than on 16's.

My reason for not wanting 20" tyres was for off road purposes and the fact that there is less chance of sidewall damage when deflated.

Cheers,

DM
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