Mine have been faultless on the Triton, including Simpon east to west, Birdsville and Ooodnadatta track high speed, SA Far West Coast, Flinders, plus a stack of 110 km/h highway driving towing a Camper Trailer. Not a hint of cracking. They have done 45ooo kms, still heaps of tread and I trust them enough to go from Adelaide to Cape York OTT and through the Qld national parks including Lakefield in July this year. They are 245/75r16. Not had a single puncture yet in all that outback travel.
My husband and I have had Cooper ST Maxx 285x70R17 tyres for just over two years on our 4WD and for almost 18 months on our camper trailer. In that time we've driven approximately 70,000kms and towed the camper trailer approximately 40,000kms - we have the wheels rotated every 10,000kms and have not had any issues except for a slow leak caused by a nail (the leak was reported by our TPMS and the tyre was repaired).
Over the last year we have travelled almost 40,000 with both the car and the camper trailer - we did a six month trip around Australia (including Fraser Island, Cape York, Gibb River Road and Cape Leveque), a few weeks in Tassie and a Victorian High Country trip (our second on this set of tyres - first was in 2015), and have run tyre pressures ranging from 8PSI to 36PSI.
Based on our 4WD/camper trailer setup and our experience we would have no hesitation in buying Cooper ST Maxx again.
Coopers are a funny thing. I've had 4 or 5 sets and never had a problem over 15 years. I know people who have had cracking and tread blocks torn off and hate them. Although no recent issues. My ST Maxx I did 70,000kms with no issues. I now have STT Pro with 25,000kms, no probs. 265/75/16 and mostly High Country work.
Thanks for the quick feedback guys, I've done a heap more research & it appears that when these were first introduced there were random incidences of the side walls splitting (as per the early posts in this thread), I couldn't find any recent posts of it still happening.
