18" Compomotive Wheels

It was Ferret that measured his, not me. Not sure what tyre he has.

Hi Bob,

Oops. Thanks ferret.

All adds to GVM running weight. I understand QLD may start weighing all vehicles randomly to ensure drivers are within the prescribed GVM.

Regards

Gerald

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Originally Posted by VK3GJM

Hi Bob,



Oops. Thanks ferret.



All adds to GVM running weight. I understand QLD may start weighing all vehicles randomly to ensure drivers are within the prescribed GVM.



Regards



Gerald

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Already happening in our region of SA...

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Originally Posted by BobD

It was Ferret that measured his, not me. Not sure what tyre he has.

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GOE rim + Cooper Zeon LTZ 285/60-18

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Originally Posted by Ferret

Happen to have one sitting in my driveway at the moment - 35.5kg

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That heavy....I must be stronger than I thought ;-)

Brett....

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Originally Posted by Ferret

GOE rim + Cooper Zeon LTZ 285/60-18

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Peter are you running them???,did you run them on the big trip??? Would you reccomend the size and brand???

PS,asked Ron for a trip report,he hasnt done so(up to yesterday).You blokes need to post up in trip reports,would love to read all about it;)
;);););)
Andrew

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Originally Posted by LandyAndy

Peter are you running them???,did you run them on the big trip??? Would you reccomend the size and brand???

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Nah, not my rim and tyre. Just needed a 6th GOE rim so borrowed one from Discotwinturbo. Had to strip off Brett's Cooper tyre though. I run Bridgestone D697 265/60/R18 on my D4.

I had no punctures on the Gibb River Rd /Bungle Bungle/ CSR. DiscoWA runs the same tyres. Again no punctures over the Gun Barrel, Tanamai or CSR for him.

I was at 22 psi front, 24 psi rear on the CSR. Not sure exactly what DiscoWA was at but it was something similar.

Given their performance, yeah I'd recommend them, as do many others here.

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Originally Posted by gghaggis

Yes, I do tow - and I understand the simple machine / lever formulae. But note that the Disco with self-levelling suspension can't really be treated as a simple lever - LR state you can increase the GVM by 100kg when towing, which takes this opposing force into account.

The above plus the guestimates for all the other weights doesn't give you a meaningful result. For example, my tow-tongue + hitch weighs 8kg; and note as before, the LR kerb weights include a driver (so that's one heavy passenger at 160kg!); the Kaymar weight is too low etc etc.

It is definitely an issue, and the rear tyres may well have to take 55psi or more, for a large van.

Cheers,

Gordon

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I did not know that LR increase the GVM by 100kg when towing ... !! I need to read the manual I guess.

I agree about the weights ... But I like to think I am conservative. I could have kept my Prado, but I felt it would be too stressed doing what I am doing. So the Disco is doing it comfortably IMO. Except for the rear axle loadings. And I guess, the rear tyres.

As for the pressure on the rear tyres - I am not sure what to do. Most say to let down pressures on bad roads. Or should I fit temperature readers on the vehicle tyres, and monitor the temps? It seems to me that stiffer tyres are less likely to puncture in rocky terrain, because the tyre walls are less exposed. But I guess if one has LT tyres, then the walls are more rugged.

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Originally Posted by Ferret

GOE rim + Cooper Zeon LTZ 285/60-18

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I have the GEO rims, but with I think 255/60 Grabber AT2s.

When I connected a resistor into my trailer indicator circuit, the Disco found the trailer was there. And the transmission hung onto gears longer. Which increased fuel consumption too ... but I think, that it does so to remove drivetrain - i.e. gearbox - stress.

I don't know about the robustness of the gears in the 8 speed box. But IMO, a downside of the 285, would be higher gearing, and more gearbox stress. With towing a 2.3 tonne van, I want to avoid gearbox stress. But on soft sand with lots of weight on the rear tyres, I'd prefer 285s. Although its how far you can let them down that increases the on sand footprint ... I guess 60 profile is 60 profile, so 255s would go down the same amount as 285s I presume. I'm not sure how much extra lift the 285s would provide. But on a heavy at the rear Disco towing a van, every bit counts IMO.

I weighed the 285 D697 tyre on a GOE rim and it came out at 33kg on my scales.