I thought that the more aggressive a tread pattern, the more rolling resistance and therefore more fuel used for the same distance.
Within reason, does the tread pattern have a greater impact on economy than the circumference of the tyre?
I have Cooper LT ATR's on another vehicle & would like to put them on the Navara when the original tyres wear out. The LT's are a bigger diameter & this has me thinking.
While I realise that you are asking about the ST's, The ATR's have done about 85,000k's with lots of heavy towing & are getting to the stage of replacement, probably at 90,000k's. The non LT ATR's that were on the vehicle previously were good for about 50,000k's, largely due to a dodgy wheel alignment.
Never tried BFG.