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  #157  
Old 05-25-2014, 01:10 AM
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Re: Off Road 18"s

Quote:
Originally Posted by Barboots View Post
Hard to answer without knowing what you're going to be doing.

I believe the percentage on road versus percentage off road concept is pretty stupid. In my opinion you need your tyres to handle the worst that you'll expect of them, even if it's only 0.001% of your usage.

Others will disagree...

Cheers,
Steve
Totally agree! When they say 80% road 20% off-road, the 20% off-road is 80% of the importance. Of course that is from an enjoyment point of view. On the other hand, the fun police view would be that if one is going to die in a car, it is much more likely to be on a freeway, so if absolute safety is your thing, then a premium road tyre might be for you.

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  #158  
Old 05-29-2014, 04:23 AM
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Re: Off Road 18"s

Got a quote from BobJane Cooper a/t3 265/60R18, $275 each. Best price so far. Beaurepair has buy 3 get 1 free promotion on Dunlop grandtrek AT22 $425 each. Good pricing, but is AT22 any good?
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  #159  
Old 05-29-2014, 04:36 AM
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Re: Off Road 18"s

No, I wouldn't say that. To me they're a virtually a road tyre... I've watched them spin uselessly against the dirt on numerous occasions. I suppose if you were only doing beach driving...

The Cooper price is good, but hey, they're P rated so should be cheaper too.

Cheers,
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  #160  
Old 05-29-2014, 06:17 AM
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Re: Off Road 18"s

Quote:
Originally Posted by Barboots View Post
No, I wouldn't say that. To me they're a virtually a road tyre... I've watched them spin uselessly against the dirt on numerous occasions. I suppose if you were only doing beach driving...

The Cooper price is good, but hey, they're P rated so should be cheaper too.

Cheers,
Steve

Thanks. I really want Bridgestone D697 LT, but best price is $431, too pricy!. How about Dunlop Grandtrek AT3, any god? If it's descend, I'll push for the promotional price.
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  #161  
Old 05-29-2014, 06:46 AM
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Re: Off Road 18"s

Remember tyres are a longer term investment, though not if you trash one early. Don't let price be your exclusive guide.

As far as the A/T3 vs the AT3... I wouldn't claim that I could call it. Neither are "off road 18s"

Cheers,
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  #162  
Old 05-29-2014, 09:26 AM
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Re: Off Road 18"s

Reading Cooper brochure, will 275/65R18 fit JGC, any negative effect?
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  #163  
Old 05-29-2014, 09:36 AM
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Re: Off Road 18"s

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Originally Posted by mmcrh View Post
Reading Cooper brochure, will 275/65R18 fit JGC, any negative effect?

With air suspension.
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  #164  
Old 05-29-2014, 10:03 AM
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Re: Off Road 18"s

Yes and yes.

From others experience, some in this size are a bit close to the guard liners. I doubt the Cooper A/T3 will be a problem... they're likely to fit fine. My 275/65R18 have just kissed the rear guard liners at maximum articulation. Wade has Cooper S/T's and uses them... aside from contacting his bull bar I don't believe he's had anything worse.

Downsides include making your speedo slightly optimistic rather than slightly pessimistic, a small degree of odometer error, minor increase in city fuel consumption and the need for a bit more power application in soft conditions. All these are gearing related... the bigger the upsize, the bigger the effect. LT construction will require lower pressures in sand and will transfer small road irregularities to the car a bit more.

I don't find any of the above a concern in my usage, which also entails a lot of inner city droll. To be fully honest though, I run the Overland 20"s Kumho 20"s some of the year too... but probably only because my girlfriend reckons "they're there and I should use them". About the only incentive for me is that they are quieter than my off-roaders at low speed.

So to me the "negatives" above are hardly worth worrying about... unlike sidewall damage while tripping about.

Cheers,
Steve
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  #165  
Old 05-29-2014, 07:55 PM
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Re: Off Road 18"s

Yeah, I get rubbing at park height when steering is at full lock, and the rears are very close. Improves a bit at normal ride height.

I drove past a speed check the other day and it said I was doing 65kph, which is what my speedo said. I slowed to 60kph on my speedo and the speed check gave me a smiley face. So it must be about dead on.
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  #166  
Old 05-29-2014, 07:56 PM
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Re: Off Road 18"s

Oh, and I'm still trying to sort out a spare.... the 275/65R18 won't fit in the spare wheel well....
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  #167  
Old 05-30-2014, 12:28 AM
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Re: Off Road 18"s

any negative effects on fuel economy of the 275/65 18s off road tyres vs the stock kumhos on 20s ?

on the triton when i went from stock 245/70 16s to the 265/75 coopers st i used ~1L /100km more which is about 6.5L diesel per tank and at about $1.5/L thats works out ~$10 extra per tank just from changing tyres

so based on the above if you drove 20000km/yr and averaged 10L/100km in a triton thats ~30 tanks = ~300bux extra /yr from running off road tyres. considering that i only going off road maybe 5weekends/yr, it's probably not cost effective using off road tyres on the road. and in my case a 2nd set of wheels/tyres is probably the go

currently averaging 9L/100km on the stock kumhos over ~10500km
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  #168  
Old 05-30-2014, 12:34 AM
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Re: Off Road 18"s

I dunno, but I'm currently doing 2l/100kms better than I did in the cruiser. So I'm happy!
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