The D840 came as standard on my Chevy Colorado Z71 2014 and they are a very good tyre. I haven't had them long, so I don't know about durability. However in heavy rain they perform great and you feel like glued to the road. Don't understand the negative comments on the wet performance...
I have tried them off road as well (no mud bogging or rock climbing) on dry and muddy trails and they perform surprisingly well.

The tyres have been on a new Colorado diesel ute for 65,000 kms. They have performed well on long trips and around town and have been very satisfactory on short periods of serious 4WD tracks. They are quiet and the car handles well with them on. Now as the rears are close to needing replacement wet weather performance from the rear tyres has fallen off a bit. This only happened after about 60,000kms.

Pajero which tows 2.5 van about 50% of time. First set (original) 65,000 second set 55,000.
Quite happy, found to be reasonably quiet, and really good in the wet. Also have travelled some off road heavily corregated roads without any concerns. I am surprised at some of the negative comments.

Have the Triton with this product, quite on the road and easy steering as well.

However it can be killed by wet condition, I have to switch 4H of my triton if driving on the raining days, thanks for triton comes with super select 4WD, otherwise I must to replace AT 265 to instead.

These would have to be the worst tyres I have ever had, they were on my Triton when purchased, so I looked up the specs for them and they claim excellent in wet weather, so I thought thats good, will keep my young family safe, but that soon went out the window with the first wet road we come across. Bridgestone should be fined for false advertising, I have never felt so unsafe on the roads in the wet. Avoid at all costs

I have a brand new Mitsubishi Challenger so tyres are new and they are the Bridgestone HT and are down right dangerous in the wet. Bridgestone should be made to pay for tyre changes on all vehicles fitted with the HT tyre due to how dangerous they are in the wet. This needs to be taken further as i have already seen the same concern on this site with the exactly same car.

Purchased New Mitsubishi Challenger in May 2012 fitted with Bridgestone D840 highway tyres. Have now travelled 70,000 kms, rotating all 5 wheels each 15,000 kms. Outstanding wear and expect to get over 100,000 kms before replacement needed. Excellent steering, braking and stability in the wet and dry. All kms have been on sealed roads. Will definitely replace with Bridgestone ecopia when the time comes.

$1600 wasted buying five tyres which have to be replaced. No issues on dry roads but deadly in the wet. I do not trust these tyres as they step sideways at the hint of rain, less than 30kph on a roundabout and the tail is stepping out. Towing 2500kg caravan. Back to Yokohama, Kelly or Mitchelin ltx/at2 for wet weather rating and ultimate safety

Got them as OEM on my 2010 Triton GLX R 4x4 twin cab. After 73,000klms, mostly road, little rough 4x4 and some beach they are only just legal. Need to replace them now and was considering the exactly the same tyre profile etc. Seems like they want $370 a pop however the 265/65 - R17 (112S) are $240 a pop. Any ideas / feedback on why the wider tyre is cheaper

OEM on Isuzu DMAX Good all round tyre. Have had 4 x 4s for thirty years with many different types of tyres. Agreed Nitos or Micky Thompsons or Cooper better tyre however the Bridgys can be bought for about $240 and thats nearly half the price of the others. They will do the 40,000km rated on the road and some off roading no problems. Have not had road noise issues or wet weather issues with these tyres (maybe its the DMAX!!!).

I have had these on a ML triton 4x4 as OEM tyres and they are just terrible at everything, even when new with lots of tread they would spin in the wet

Would not even consider taking them off road

They also keep small rocks and mud in the tread

These are rubbish. I had then on a Triton from new and they are slippery on a wet road and I managed to spit them on the gravel. If they were good on the highway I could understand they are no good for anything. It's been a few years since I had then but I kept the new spare tyre and old Toyo's A/T to sit my boat on it the backyard when I do trailer maintenance. The Toyos'are so much heavier and the Bridgestone just collapses under the boat's weight. If I bought a new Mitsubishi I would take it straight to a tyre retailer and change them. My Maxis 771's are excellent.
Nothing
Poor performance. Weak. Dangerous on the road

OEM on Pajero NT. Have done 30,000km and am guessing they will not make 40,000km. Noise level is not noticeable. Appear to handle ok.
Have been quoted $420 F&B by Mitsi dealer to replace them. I consider that way too pricey for a tyre that has a road life of say 35,000km.
Cooper AT 3 and Mickey Thompson equivalent are about $360 F&B and word of mouth has it that they
will give almost double the mileage.
Can't help thinking that Bridgestone aim these tyres at the ignorant who will only put on the car what it was supplied with and are thus over charging.
No problems. Seem safe and reliable.
Too short life.