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18" Wheels and AT Tyres

13K views 101 replies 14 participants last post by  Traktor 
#1 ·
I'd always planned to switch to 18"s with AT's when I had gone through the rubber on my 20" Kumho's. After a drive through some rocky hills today, putting up with the harsh ride, having people ask me if my tires were flat all day because of how deformed the tyres were when sitting on rocks due to the soft side walls, scuffing all my rims and eventually destroying a tyre I'm going to have to move on it a bit sooner.

I'll get in contact with my local retailers on Tuesday but thought I might try and get some advice here first. I have read through most the big threads previously but I figured I would put my requirements out there with the hope of some sound advice.

Im definitely after an 18" wheel, not really interested in the Mopar ones, would prefer something with some if not all black. Been looking at these:

ATX AX181-Artillery 18" x 8" +35 | Murchison Products AEV QLD Distributor

Just wondering if anyone has any better suggestions?

Next question though is tyres, I want an AT, preferably an LT with decent sidewalls to avoid todays issues but then I worry about speed rating. Bigger would be nice but what will fit under the QL in aero mode and not scrub and also what do you do with the spare.

Hoping someone has gone down this path already and can provide some advice? Thanks in advance
 
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#36 ·
Yeah, looks like I found another source in Australia at half the price....

What is the story with the TPMS sensors? They can be taken out of the existing rims and put in the new by a tyre fitter right?

Is there one in the steel spare? I'd like all 5 to have the sensor so I can rotate them.
 
#37 ·
Fine to use existing ones. Only need to use different ones if they are old.
 
#39 ·
Actually you only need to change the base, not the TPMS itself.

For the cost, it makes better sense to leave the existing ones in the rims and buy another set. The redundant rims are more saleable if equipped, and moving the TPMS bases around is not recommended unless they are quite fresh.

I don't believe the spare is equipped.

Cheers,
Steve
 
#38 ·
Ok, do you know if the steel spare comes with one? If not I'll need to order a sensor for my new spare rim, if the system allows 5 to connect....

Otherwise I might not include the spare rim in the rotation....
 
#47 ·
lol, dealer doing a good price on the rims wanted $320 for 4 sensors.... hello ebay!

I wonder if they come as a set of 4, and they were pricing me for 16 in total?
 
#50 ·
Ordered.... $1100 for the 4 rims, plus freight.
I need to set up my paypal to order those sensors....
Next is tyres.
I'm coming from Mickey Thompson Baja ATZ.... thinking of going with a cooper tyre, the ST/Max looks cool, but maybe overkill. Most of my off road driving is sand, but I do get into the mud once in a while.

Maybe the AT3 in LT, looks like they only do 275s.
 
#51 ·
It's amazingly stupid Mickey Thompson are only offering the STZ with a Passenger carcass in the relevant size. That would be ideal.

If sand is your main destination, be considerate of the effect on the car with "excessively" luggy tyres (for your purpose). I'm sure you already know this.

My impression is that the Grand allows you to feel/hear more of the tyre's characteristics than the type of vehicle you're coming from.

Cheers,
Steve
 
#52 ·
Hmmm, yes I'm a bit torn on how luggy I'd go. Not interested in MTs, but the Maxx might be acceptable... anyway, I'll have to look at some of the other options. I see ds84 has some Bridgestone D697s on the same black rims I'm getting. Might have to PM him to see how they are going.
 
#56 ·
The next question I have on tyres is what is the maximum profile we can fit to an 18" rim? The original is a 60 (775mm OD?), so a 70 at ~850mm is over the 50mm allowable increase, is that right, or am I missing something?
 
#58 ·
Have you been back to the Off Road 18"s thread? There's pictures of my 275/65R18 fitment which shows they are about as big as will fit without surgery.

Cheers,
Steve

PS: Whilst you can calculate diameter, the manufacturer's spec is really the only thing worth banking on. Tread depth varies...
 
#59 ·
Yep, saw that, so no one is fitting 70 profiles to the 18s?

As far as I can tell the cooper stmaxx only come in 70 profile on 18s, the published OD is 847mm. So I'm guessing that is a no go!

I see the wildpeaks have a 275/65R18 in the 2 ply sidewall, but if you want 3 ply, it only comes in the LT275/70R18....
 
#61 ·
Yes, I think I've realised that now..... thanks for your help so far!

I've got a bit of time to research until my rims arrive, the current short list:

Cooper AT3 LT275/65R18
Mickey Thomson ATZ LT275/65R18 (not sure if these are still being made?)
Bridgestone D697 LT265/60R18 (a bit small! And expensive!)
WildPeak LT275/65R18 (Tread looks good, not sure about the side walls)
BFG LT265/65R18 (Meh!)
Nitto Terra Grapplers LT275/65R18 (Maybe)
General Grabber AT2 LT275/65R18 (yours look good!)

Sizes are per websites, but could be different options are available....
 
#62 ·
i was thinking about getting a set of 18s and put all terrains tyres on them for off roading and swapping back to the 20s for the road.


is it just a matter of getting a set of tpms eg
Dodge Chrysler TPMS Tire Pressure Sensors SET OF 4 Free Shipping | eBay

for the the new wheels ?

do i need to reprogram the computer to recognise the new tpms sensors everytime i swap wheels or would they just get recognised and read properly in the dash ? it would be a pain to have to goto the dealer everytime i swap wheels ?!
 
#63 ·
i was thinking about getting a set of 18s and put all terrains tyres on them for off roading and swapping back to the 20s for the road.


is it just a matter of getting a set of tpms eg
Dodge Chrysler TPMS Tire Pressure Sensors SET OF 4 Free Shipping | eBay

for the the new wheels ?

do i need to reprogram the computer to recognise the new tpms sensors everytime i swap wheels or would they just get recognised and read properly in the dash ? it would be a pain to have to goto the dealer everytime i swap wheels ?!
Jeep Grand Cherokee WK2 - 2011 Grand Cherokee Tire Pressure Monitor System

8. Perform one of the following to make the system learn the new sensor ID:
a. Use the TPM-RKE Analyzer, 9936, with the Scan Tool to program the WIN with the tire pressure sensor ID. This is part of the TPM Diagnostic Verification Test.
b. Once the vehicle has remained stationary for more than 20 minutes, drive vehicle for a minimum of 10 minutes while maintaining a continuous speed above 15 mph (24 km/h). During this time, the system will learn the new sensor ID. This is part of the TPM Diagnostic Verification Test.
 
#64 ·
If you are only going to use these 18inch rims for offroading and letting pressures down, you may decide it isn't worth installing sensors in them....
 
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