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  #85  
Old 06-03-2013, 04:46 AM
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Re: 20" Tyre Thread

Just a note on different tyre diameters and speedo error, when I changed tyre's my speedo seemed pretty much right, just thought I was lucky, but found out from the Jeep guru I go to they have a list of several different tyre diameters they can load to correct the speedo or at least get it close.... Clever huh!
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  #86  
Old 12-05-2013, 05:47 AM
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Re: 20" Tyre Thread

Aqua planed at 120kmh twice today Time to change the Khumo's (that at 38k are still 1mm to 2mm from the wear strip). I've lost all confidence in them in the wet. With the rainy season ahead, the likelyhood of being upside down in a ditch is a no-brainer.

Me thinks Cooper LTZ's. Any advice?
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  #87  
Old 12-05-2013, 07:17 AM
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Re: 20" Tyre Thread

Glenn,

At least you managed 12k more on your tyres than I did. My Kumhos only lasted for 26k.

Have you looked at the Nitto Terra Grapplers? I recently replaced all four for $265 each from a dealer in Sydney.

Surprisingly tyre noise is barely noticeable, slightly more than the Kumhos but with the windows up I can't tell the difference. Steering, however for the first few hundred k's seem a bit heavy. Probably due to the more aggressive tread.

They also come in an OEM size, 265/50/20. Could have gone to the next size up but was afraid of rubbing when vehicle is in park mode.

Tyres are also great at preventing rim rash as the tyre sits a few cms further out from the rims than the Kumhos. I'll post some pics tomorrow for you if you like.
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Old 12-05-2013, 05:03 PM
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Re: 20" Tyre Thread

I am favouring a more aggressive tread pattern, but I am mainly looking for a good wet weather performance. My drive to and from work uses country roads with relatively poor drainage. Losing grip at speed has made whats left of my hair turn grey and fall out!!!I have been following the US Grappler thread and they do look the business, but there are also some good reviews on the Coopers here in Aus. I might find a dealer that stocks both.

PS, thanks for the reply and $265 a corner is a great price!!
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  #89  
Old 12-05-2013, 05:11 PM
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Old 12-05-2013, 05:39 PM
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Re: 20" Tyre Thread

Quote:
Originally Posted by wabat View Post
Glenn,

At least you managed 12k more on your tyres than I did. My Kumhos only lasted for 26k.

Have you looked at the Nitto Terra Grapplers? I recently replaced all four for $265 each from a dealer in Sydney.

Surprisingly tyre noise is barely noticeable, slightly more than the Kumhos but with the windows up I can't tell the difference. Steering, however for the first few hundred k's seem a bit heavy. Probably due to the more aggressive tread.

They also come in an OEM size, 265/50/20. Could have gone to the next size up but was afraid of rubbing when vehicle is in park mode.

Tyres are also great at preventing rim rash as the tyre sits a few cms further out from the rims than the Kumhos. I'll post some pics tomorrow for you if you like.
I'm looking into these, love to see your pics.
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  #91  
Old 12-05-2013, 09:49 PM
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Re: 20" Tyre Thread

Goodyear Adventures do a 20" with a km warranty. Waiting to hear on Mickey Thompson STZ's. (Do they come out of the Coopers factory?).

Edit, What about a Cooper LTZ 285/50/20? Apparently the 285 fits on the 8" rim no problems. Bit pricy at $400 per corner but might be better quality than the Goodyears?
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  #92  
Old 12-06-2013, 01:27 AM
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Re: 20" Tyre Thread

Good Afternoon fellow owners.

I am about to change over from OEM Kumhos, 34K 's to Pirelli's. Have on order for fitting in January 2014.
One question arises is what did you do about the TMPS . Was there any issues with resetting etc. Not sure what the protocol is with it when changing over to new tyres.
I would appreciate any advice about any experiences you may have had or any additional requirements needed.

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  #93  
Old 12-06-2013, 04:58 AM
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Re: 20" Tyre Thread

The TPMS are attached to the valves so it's just a straight tyre change and no changes to the valves unless the TPMS batteries are flat. I believe the batteries should last for at least 5 plus years.

There wasn't anything to reset. Just drive the car for an extended period above a certain speed and the sensors will read the new tyre pressures (someone tell me if I am wrong here).

I've tried Coopers in a previous 4x4 but was very unhappy with them. Mind you they were Cooper HT tyres but I kept getting them punctured. They were annoying as they were so noisey and provided no grip in the rain. They felt unsafe when going around roundabouts during the rain so I had them replaced by Michelins.

Pity Michelins don't do 265/50/20s.

I've attached a few pics below showing the car at full height and in parking mode. Some of the pics show how the Terra Grapplers extend well beyond the rims (more so than the Kumhos) so they provide alot of rim protection.

Its been raining in Canberra and the tyres have been excellent in the rain. I originally had the tyres at 40psi but the ride was a bit harsh so now have them at 36psi and the ride is sweet as. Also the tyres are either made in the US or Japan and you can choose which side to have facing out as the lettering is different (bold vs stripped filled).
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  #94  
Old 12-06-2013, 04:59 AM
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Re: 20" Tyre Thread

Some more pics
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  #95  
Old 12-07-2013, 04:15 AM
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Re: 20" Tyre Thread

Some have mentioned that certain tyres extend beyond the rim more therefore provide more protection for the rim. That's great for street but bad for off-road. One of the reasons LT tyres are favoured for off-road is that they don't bulge as much and therefore the sidewalls are less vulnerable to punctures. As you know, a sidewall puncture means a tyre destroyed.
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  #96  
Old 12-08-2013, 09:24 PM
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Re: 20" Tyre Thread

Quote:
Originally Posted by BobT View Post
Some have mentioned that certain tyres extend beyond the rim more therefore provide more protection for the rim. That's great for street but bad for off-road. One of the reasons LT tyres are favoured for off-road is that they don't bulge as much and therefore the sidewalls are less vulnerable to punctures. As you know, a sidewall puncture means a tyre destroyed.
A true blue 4by showed me an another example of negative effect of having too wide a tyre set at too high or too low pressure, each scenario leading to uneven tyre tread contact on the road during normal highway driving. Basically pointed out if the pressure is too low, the tyre will tend to wear on the inner and outer edges evenly with little wear in the centre and visa versa if the pressure is too high. He recommends sticking as close to OEM 265/50/20 as possible even though a 285/50/20 is within tolerance.
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