The most recent owner reviews from this car, in their own words.
Seemingly no compromises.
Uniformity - On first install, two showed high roadforce over 30lbs, even with match mounting. They were replaced by the tire dealer and the replacements spun well. Highest tire had 8lbs of roadforce and none needed more than 1.5oz of total correction weight, even with smartweight turned off and performance mode enabled. Excellent excellent uniformity.
Overall Driving Experience - These have exceeded my expectations and then some. Due to the great uniformity, forcematching, and a good balance, the car feels like it isn't even moving on fresh pavement, if you take out the wind noise. The steering wheel felt eerily void of any vibration. On fresh pavement, there's zero tred noise. On older/rougher pavement, theres certainly noise but its a low, diffuse grumble that very easily becomes unnoticeable. Impacts are muffled with zero resonance, while generally smoothing them out, atleast as good as you can expect from a performance tire. Stuffing them into a corner, they do communicate what they're doing. Slip is progressive and predictable. They're not squirrely on-center and allow for a very relaxing highway cruise with minimal to no micro-corrections, but once you start to point them where you want to go, they do so eagerly and with no fuss right up to the limit. These really do give the best of both worlds. Smooth, drama-free driving around town and on the highway, but they will absolutely dance on a back country road and put a smile on your face.
Almost 15k miles on this set and they show no obvious signs of wear. Feeling the tred before rotations, they seem to exhibit a near un-noticeable amount of heel-toe wear across the sipes/tred blocks. Their ride quality, acoustics, and performance seem to have remain unchanged. At the current wear rate, they will likely meet their warranty mileage. Side note, I got near 100k miles on a set of the old P-Zero All Season Plus on a previous car. Astonishing tire line, as long as they're a replacement tire with a warranty.
Nice handling tire in the dry but not the best I've had in the wet.
Tires had dry tears in the sides after one year already. I tried to reach Maxxis but no response at all.
These tire's worked really well on my Golf mk7 GTI in summer weather conditions. I've used both Good Year Efficient Grip and Falken tires at the front wheels and I felt them a bit less stable at higher speeds and especially very grippy such that when you brake hard the vehicle used to swerve/float at high speeds, this was not experienced with the Sumitomo. Excellent tire for handling, this is my second pair at the front. The only downfall is that on hard acceleration there is a lot of spinning as compared to the other brands and the tire's don't last long.
I do a lot of miles in my Golf GTI and these are wearing very well, 25,000 miles already and still seems like a good amount of tread left. I did rotate front to rear at 15k. Very comfortable too.
Really like the PS4S. For backroad spirited driving, they've been absolutely fantastic. I don't find them noisy, and wear on them has been quite reasonable. I used them for a day of open lapping at one point too, and they did really well on track.
Last year, I decided to try the Firestone Indy 500 (aka Bridgestone Potenza RE003) because they're significantly cheaper, but they sucked in comparison and I swapped back to PS4S within a couple of weeks.
I moved from the Asymmetric 5 to the new Asymmetric 6 a few weeks back, and while I don't know about wear, everything else seems better. The handling is improved and noise in the car lower.
Found PS4s to be an overall good tire but they can be quite dull on road feedback wich I absolutely hate. Compered with PSS which will stick the performance GTI like glue on dry (although not so great in weat), PS4s will lose greap when pushed at limit when cornering.
For 2021 I needed new tires for autocross and with the RE71R no longer available, my shopping list was pretty short; the RT660 or the Yokahama A052. Both tires have had reports of not being happy on front-wheel drive, camber limited cars like my GTI. Between the two tires my autocross contacts recommended the RT660, and I decided to gamble on them.
After all my experience being on the RE71R, I was a bit nervous. The RT660s did not disappoint.
Positives
- Good feedback though I miss the on -center feel and stiff sidewalls of the RE71R
- Grip! I was pushing through a large sweeper at full throttle. I expected to lose grip and possibly spin, only to be pleasantly surprised.
Negatives
- Not much given my narrow expectations.
- Accelerated wear. I will not get two seasons of autocross out of these like I did the RE71Rs
After about 100 runs I have zero signs of tire chunking or delamination. I am extremely careful about my tire pressures, which in my case are generally 44 front and 39-40 rear. Tire wear is high, so I will not get two seasons of use out of these tires. I did have them flipped on the wheels and I rotated front/rear, but autocross is hard on tires.
I will buy the RT660s again.
While driving was good and quiet (no stange noises, no whine on higher speeds), after 4 months of using the tires there are pieces of the thread missing. This unfortunately happened to other people as well which can be read on the German board "motor-talk" including pictures. So I unfortunately have to judge these tires as not long lasting. The thread blocks became wobbly and pieces have broken off. The dealer acknowledges the problem. While the thread is still very big, my tires reached end of life in 4 months.