LR are on record for being open to give code to aftermarket re: new defender dependent on end result trying to achieve of course.
Probs a question for Gap, maybe start a thread just on that, get support, show gap if not done already
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The Cooper Tires website has this:
"Australian Vehicle Standards rules state that a 4WD manufactured with off-road features must have a tyre speed rating of N (140km/h) or greater."
So just about anything goes!
Tony
Now done 40k on the Pirelli Scorpion all terrain plus 275/55R20 113T. Lots of rain this week and especially today. Out and about in the disco today to find it has lost a lot of grip in the wet which is disappointing to say the least. There's a lot of tread left on the tyres but obviously their ability to deal with water on the road has diminished a lot.
I’ve had mine for 12000km now and super happy with them. Very low noise on highway too. Can’t say there has been a lot of rain and mostly slow suburb driving when wet so maybe I haven’t noticed that. Overall very happy with the choice... will check in again when I hit 40k
Mine have barely touched water in their 27K kms so still to be proven but to date they've been perfect for my use. I would however prefer them in 255/60R19 LI 113, the same as the Pirelli Verde AS.
Fitted a set of Nitto Ridge Grapplers to my D5.
275 x 55 x 20
Great Tyre
Good on road & off
Have improved on road performance noticeably
Marginally noisier with radio off at low speed on bitumen - as soon as radio is on can't hear them
I've spotted that the GG AT3 is made in 255/60R19 LI 113 but they're not on GG's AU website. If I could get them locally I'd get 19" D4 rims for my L322 to give them a try.
I've also spotted that Toyo have released in the US the Open Country AT3 which is available in 255/60R19 LI 113, although the AT3 doesn't appear to have been released in Oz yet. If imported it might also be a good size for D4s etc to get a little more sidewall and higher load rating for outback touring. 255/55R19 LI 111 is also listed.
I am back from a four week trip, visiting the Silo Art Trail in Victoria - all bitumen - then doing the Darling River Run from Wentworth to Lightening Ridge - 700 kms of mixed dirt to Bourke, then mainly bitumen to Lightening Ridge and back to Melbourne. Total of 4,000 kms.
I am using Nitto Trail Grabber 275/55R20 117T. They are much lighter than the Ridge Grapplers. They are very quiet - except on really course bitumen, but then everything is noisy - and handle extremely well on all the surfaces I travelled plus wet and dry bitumen.
They have now done around 12,000 kms.
Cheers
Numb Thumbs ;)