265/40 R18 Tires

I've had these KU39 tires on the rear of my BMW 520d touring for the last 14 months. Unfortunately 1 tire blew out through the side wall whilst towing a caravan, however I blame it on the pot holes and state of the roads. The other rear tire has just reached its end of life at 20,500 miles, and whilst I could drive another 2000-3000 miles the winter is approaching and its better to get some extra depth of tread.

This is the 3rd set of Kumho's I've had on my BMW and I do enjoy them. They are quite, comfortable and grippy both wet and dry. The last set I had lasted 23,000 miles, so these ones are a little less. Generally they wear similar to Hankook tires but are cheaper, although I've found I can get longer wear out of Contiental tires, but they are not as comfortable as the Kumho's.

Good deal when on sale for such a high performance tire. The TW rating and performance is a good street daily mix. Have not experienced any hydro planing even with the increased width. Car is G37s (big brakes) 6mt with hks digresive coil overs and extra 1 deg camber in front and back. Very sporty feel and will tram line on undulating road + tar snakes

There's tires handle very well in wet and dry conditions. When the D starts to go on the wear indicator these tires tend to spin a little bit from a stop. I originally got these tires for hydroplaning issues. These did great until after you get past the w wear indicator on the tire in wet weather. They still preform alright in the rain even when the w is gone, just can't be on throttle because you'll spin. Tires have been abused quite a bit on long mountain runs especially on corners. Have been my daily tires since 57k miles now have 91k. So I'd say these are worth it. Highway driving these tires are pretty quite.
-Wheel measurements: 18x8.5
-Suspension: Ebachi pro kit lowering springs with stock magnetic shocks from honda.

Great tires for the price! 23,500 miles and 15 months driving before they were down to minimum wear markers and needed replaced, which on my BMW F11 520D rear wheel drive seems to be about average life expectancy. Tires never lost grip once, wet or dry. I would have preferred if they lasted at bit longer, but I tow a caravan about in the summer months which probably shortens their life.They seemed to get a little noiser when they were well worn down.

I just bought these tires for my "winter" wheels (Square 265/40R18). I wanted a set of tires that can be considered very safe in cold/wet conditions. The first thing I noticed was the ride comfort and overall lack of road noise. Considering this tire will never see the track, this was an excellent revelation. The tires are very sure footed in wet conditions, and they can safely disperse puddles that accumulate on the road.

These are just my initial thoughts, but so far, so good.

Needs tons of heat to develop initial grip and losses grip when cooled down abruptly. Very poor grip and handling on wet when paired with powerful rear wheel drive (too hard sidewall cannot transfer torque properly).
Absolutely terrible in wet, literally zero resistance to aquaplanning, not enough groove pattern.
Gives great feeling and handling in corners when hot which is the only advantage. In other case completely useless on regular road or in wet. I recommend to use only on track without any moisture.

Recently switched from the trusty PS4 after a solid 5-year run to the V601s. Performance wise it’s been impressive, delivering fantastic handling in both wet and dry conditions. However the only drawback I’ve encountered is the quicker wear and tear. With just around 20.000kms on the odometer, the tread is nearly worn out, warranting a replacement after roughly 9 months of use. Overall, while the performance is on point, the lifespan might be something to keep in mind.

Outstanding UUHP tire. Sharp on the steering with excellent feedback in both the dry and wet. Grip is exceptional once warmed up (takes a few miles to build temperature) and the performance on a wet road is incredible.

Downsides are the tire has high road noise and transmits sudden shocks into the chassis rather than absorbing in the tire, not too bad if you have decent damping but something to be aware of if you value comfort and noise. Very much a "sporty" tire for everyday driving without being too track focussed (ie normal road driving gets enough heat into the tire to "switch on" the grip)

Cannot comment on wear as only put 2k miles on, but good to see tread depth and the small about of sipes go all the way to the base of the tire which suggest performance should stay reasonably consistent over the life of the tire. Tire wear seems average for a UUHP tire based on current wear rates.

Run these on our track 987 Boxster 300bhp. Insanely brilliant tire, certainly suits the Porsche. We were noticeably quicker in the corners both at Snetterton and Brands. Just need another 100bhp for the straights. I wouldn't buy any other track tire.

Handled and rode very well. Still have half tread after a dozen track days but heat cycled out after about 10. Good value but will flat spot after sitting especially in colder temperatures. Needed rebalancing a few times

Fitted to the rear of an S-Class. Ok in the dry, but noisy. In the wet, outright dangerous, next to no grip. Snap overseer. Wore out in little over a month, compared to six normally for a premium tire with equivalent driving. Avoid!

Excellent dry grip for the price. Wet grip is average, not dangerous but will spin up when you put your foot down. Sidewalls are very hard so they are a bit noisey and harsh.
Overall a good tire for the price