Bridgestone Dueler H/L 400 RFT 

Great tires no issues of any kind, great traction on wet roads

the first 20,000 miles are very good. dry and wet grip were strong on turns. I had confidence taking sweeping turns 15mph above posted speed during steady rain conditions and 25mph above in dry conditions. rotated every 10k miles with no uneven wear.
at 25K mi., I approximate less than 25% tread remaining and wet grip decreased noticeably.
I do not recommend these tires due to price point and will consider other brands such as Michelin CrossClimate2 in 235/55/17.
I will not use these tires to completion and am ready to dump them post haste

Not sure why this tire gets generally low ratings...I have about 8k on this new set of RFT's and they seem to be a pretty good 3 season tire: good grip wet or dry, quiet, a bit firm on cleveland pothole strewn streets, but that could be the BMW X50's firm suspension more so than the hardness of the tire. Not too many miles so far, but reasonalby impressed with this RFT (which I generally loath). True convession - I did buy a seperate set of snow tires to get throught the Cleveland winters - these tires are weak in the snow/ice. It would be totally embrrasing to end up in a snow bank with an X5...and I don't like to slow down just for a little snow.

the first 20,000 miles are very good. dry and wet grip were strong on turns. I had confidence taking sweeping turns 15mph above posted speed during steady rain conditions and 25mph above in dry conditions. rotated every 10k miles with no uneven wear.
at 25K mi., I approximate less than 25% tread remaining and wet grip decreased noticeably.
I do not recommend these tires due to price point and will consider other brands such as Michelin CrossClimate2 in 235/55/17.
I will not use these tires to completion and am ready to dump them post haste

255/50R19 that came with MY13 BMW X5 35d.
Overall positive experience, with one exception - this tire has absolutely no grip on icy surface. None whatsoever.

Tires were rotated every 10,000 miles.
Great dry traction, good cornering stability.
I replaced them at 67,000K miles with 4/32" remaining thread.
Never had air leaks, even thread wear, no noise.
They would of lasted another 20,000K on dry roads, but I needed something different for snow days.

Summary
If you looking for everyday highway tire - this is good choice. Ice and snow - these tires are not an option.

Not sure why this tire gets generally low ratings...I have about 8k on this new set of RFT's and they seem to be a pretty good 3 season tire: good grip wet or dry, quiet, a bit firm on cleveland pothole strewn streets, but that could be the BMW X50's firm suspension more so than the hardness of the tire. Not too many miles so far, but reasonalby impressed with this RFT (which I generally loath). True convession - I did buy a seperate set of snow tires to get throught the Cleveland winters - these tires are weak in the snow/ice. It would be totally embrrasing to end up in a snow bank with an X5...and I don't like to slow down just for a little snow.

255/50R19 that came with MY13 BMW X5 35d.
Overall positive experience, with one exception - this tire has absolutely no grip on icy surface. None whatsoever.

Tires were rotated every 10,000 miles.
Great dry traction, good cornering stability.
I replaced them at 67,000K miles with 4/32" remaining thread.
Never had air leaks, even thread wear, no noise.
They would of lasted another 20,000K on dry roads, but I needed something different for snow days.

Summary
If you looking for everyday highway tire - this is good choice. Ice and snow - these tires are not an option.

This tire came with the purchase of my 2013 X5. The first year I had the car I did not drive it winter conditions. This year I drove it on and off over the winter. The results are terrible. This tire is not all season, but reacts more like an UHP Summer Tire. Simply put, this tire is treacherous in ANY winter driving conditions, no matter how little snow or precipitation. The back end will slip and slide with even minimal snow or precipitation. Steering input is also compromised in winter conditions making tracking very difficult. Thank --- I've graduated from the Bridgestone Winter Driving School or the X5 would be totaled by now. I am also thankful that the tires wear very poorly so I won't fell badly about replacing them after 22k miles.
Horrible Tire for anyone driving in other than dry conditions.

The Bridgestone Dueler runflats which are on my MBenz 2010 350 BlueTec perform fine on dry or wet pavement. Where I am disappointed in these tires is their performance in the winter in snow. They tend to slide, they don't give me a feeling of confidence that they will stop or steer well in snow.

My biggest problem with these tires is that over bumpy terrain they are really really bad. When I say bumpy terrain I don't mean rocks and boulders I mean ordinary roads that are not very smooth. On certain highways the car really shudders over the older sections. I think most of the issue is caused by the technology used to make these tires run when flat. The sidewalls are so stiff that every road imperfection is transferred to the cabin and between bumps the tire does not have a chance to settle down so a series of bumps leads to chaos from the tires. On long drives I find the tires to be ... tiresome. The near constant feedback into the cabin from every minor road imperfection adds up on long drives. These are the only run-flat tires I have ever driven so maybe they are all this bad or these are worse than others. This problem is even worse when off road. The tires don't really yield to the contours of rocks and you cant deflate them slightly for use on sand. They are useless in those places. When the road is smooth then they are good tires. Better grip than expected on dry roads, and thanks to the stiff sidewalls they offer excellent cornering stability. They provide sufficient confidence on wet roads. I have not driven them in snow.

Bought a used 2011 X5 that had these tires. Although the X5 is known to 'eat' front tires on the inside edge - these tires were cupped badly on the inside edge and the road noise was extremely loud. Could not wait to get new tires. Friend has exact SUV with the same tires - his did the same thing. While others might have good experience with these tires - I know of two people that will never buy them again.

Original tires on my wife's car. She drives very cautiously; these are worn out after 27K miles?! Horrible tread life.

I have a Mercedes GL450 and the Bridgestone tires wear out too quickly. I realize this is a heavy AWD vehicle, but they don't give the wear for the price.