Well, continuing the research I found this on the transport Qld website -
Speed and load ratings
The speed rating of all tyres must be:
• a speed of at least:
for an off-road passenger vehicle – 140km/h
for another car (sedan, station wagon etc.)
up to nine adult seating positions or a car
derivative – 180km/h
for another motor vehicle – 120km/h
• the vehicle’s top speed, if lower.
Load ratings of tyres must be at least equal to those
specified by the manufacturer on the tyre placard fitted
to vehicles made after 1972. For other vehicles, the load
rating of a tyre must be capable of carrying the part of
the vehicle’s gross mass carried by the tyre.
Now that is good since virtually every tyre that fits is rated above 140kph. Wish I had found this when I was researching. Pretty sure that the Landrover manual says it has to be the same or higher speed rating.
CC - the tyre must have been pretty good as fitted since it did not show any signs of vibration at all. Score one for the bush mechanics  .
.
Tim.
				
			 
			
		 
			
				
			
				
			
			
				Snowy - 2010 Range Rover Vogue
Clancy - 1978 Series III SWB Game.
Henry - 1976 S3 Trayback Ute with 186 Holden
Gumnut - 1953 Series I 80"
Poverty - 1958 Series I 88"
Barney - 1979 S3 GS ex ADF with 300tdi
Arnie - 1975 710M Pinzgauer
			
			
		 
	
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