Dunlop SP Sport 4000T DSST Sizes & review

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Original Equipment (O.E.) self-supporting run-flat summer tires are an appropriate tire choice for sporty vehicles manufactured in the U.S., as well as those imported from Europe and Asia. Developed for use on new cars and light trucks, these tires offer temporary extended mobility in the event a puncture allows complete pressure loss, as well as provide a sporty blend of ride quality, noise comfort and handling, along with dry and wet traction. These tires are not intended to be driven in near-freezing temperatures, through snow or on ice.

Dunlop Self-Supporting Technology (DSST) tires incorporate special sidewall reinforcements that support the weight of the vehicle even after sustaining air pressure losses that would render conventional tires immobile. While internal tire damage will likely make replacement necessary, DSST tires are designed to endure being run on while flat for up to 50 miles at speeds up to 55 mph and provide drivers the temporary extended mobility necessary to drive through stormy weather and away from dangerous situations.

Original Equipment self-supporting run-flat summer tires are most often repurchased as direct replacements for pairs and sets of worn out Original Equipment tires and Dunlop Self-Supporting Technology tires are only recommended for vehicles originally equipped with self-supporting run-flat tires and a tire pressure monitoring system.

While we attempt to provide a picture of as many of these tires as possible, the pictures used to represent these tires cannot be guaranteed to be an exact depiction of each tire’s appearance because of the variety of subtle differences in tread designs and sidewall styling.


  1. OEM tires on my AWD Sienna XLE lasted longer than most of the other reviewers. I maintained them at 35 psi and rotated every 5,000 mile oil change. I didn’t have any problems driving from Spokane WA to Tahoe through various amounts of snow (twice) or cross-country from Spokane to Norfolk VA in the summer mostly along I-90. No problems with hydroplaning in rainy Norfolk, city or highway. After almost 4 years of use, one tire developed a slow leak and wires from the sidewall of two tires started showing. We replaced all four with Bridgestone B380 run flats because of their lower price. These are smooth and quiet for now, but I would consider getting the Dunlops again if the Bridgestones don’t wear as well &/or the prices get closer.

  2. Totally Flat on left front drove 30+ miles to dealer safely. Dealer said actually both front tires were flat, other 2 tires in very bad shape. Only 35,000 miles on them. Rotated every time oil changed, always at dealer. car has tire pressure monitor. Was hoping to get 50K as on previous I’m easy on the brakes, not agressive, and mostly highway driving. Left front tire was shedding tread…all 4 were cupped, tho dealer claims not caused by alighnment, and I don’t tow aything. Toyota recommended 35 lb pressure – which I maintained, but mechanic now says check every other week, inflate to at least 40 lbs, don’t depend on tire pressure monitor…I’m installing 4 new ones, hoping for better results this time….I like the safety..hate hate hate the noise!!!

  3. Our Sienna came with these run flats since Toyota decided to not add a spare on this car. These tires are terrible. They wear out much sooner than any other tire I’ve owned, and the ride inside the car is terribly bumpy and noisy. We’ve replaced 4 sets, and these are really expensive tires.We decided to change to normal tires and pay for a road side assistance service in case anything goes wrong.

  4. This is the third set of these tires we’ve gone through with 107000 miles total on the car and so far this set is wearing the best. I’ve got relious about rotation every 5000 miles and have been keeping the pressure at 40 instead of 35 PSI. At 32000 miles they are not quite down to the wear bars yet and they will probably go another 5000 before they’re down. They have worn much more evenly with the high inflation. If we had a normal winter with more rain and snow I would have replaced them by now. I’m going to try Pirelli cinturato P7 all season runflats (which are backordered).They are cheaper and get better reviews. With the AWD we’re going to stick with runflats, don’t want to carry a spare and the fix-a-flat/cell phone/AAA solution doesn’t make me feel too secure with my wife driving the Sienna much of the time and the spotty cell reception in our area.

  5. i’m not a big tire guy. i just know that my wife is sticking with run-flats. that said, the dealer originally was telling us that it is not uncommon for these dunlops to last only 18K miles. in our previous german cars and suv’s, we were accustomed to getting 32K on michelins costing about the same as these. so far, these are these dunlops are doing what is expected and the tread is still a good 5/32″ after 21K miles. we did buy a mounted spare from tirerack, so if we ever need one on a sunday (when all tire stores seem to be closed) we will have one. i created a facebook group for sienna owners who would have or need a mounted spare, but so far no one has joined. i just wanted to include our experience because i feel that most reviews are from people who’ve had terrible experiences and may not be typical of ALL users. we rotated about every 10K miles, and i check pressures about once very 2 months, so probably about half the official recommendation (this probably represents closer to real world, non-car-crazy, practical frequency). one other note: it is very helpful to get tire stem extenders from an auto parts store, as it is very hard to inflate with typical rounded gas stations air pumps. get the plastic ones and only use when inflating (don’t keep them on all the time). don’t use the metal ones, as they may interfere/damage the air pressure sensors.

  6. Horrible tires. Cannot open windows on car if your speed is > 30MPH or the road noise from them is painful. Tread wear is awful. At most they last 25,000 miles. Toyota replaced the first set for free due to wear issues. I’ve yet to make it thru another full life on the replacements since they fail so often (must be the rigidness). I did have a flat which I had to drive 80 miles on. You cannot drive 50MPH on a flat – just driving 20MPH was scary due to the vibrations. Not everyone carries them so finding a replacement was difficult. And to make matters worse, the cost of each tire replacement is staggering. These tires have been a nightmare. I wish this car had room for a spare so I could replace them with regular tires.


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