Buy winter tires. Differences from studless tires and stories about TPMS.

Porsche Cayenne winter tires
Cayenne E-Hybrid

Winter tires and studless tires are completely different

The other day,I changed the Cayenne tires to winter tires.Until this time, I saidWinter tires and studless tires are the same, only different names are used by people.I thought, but for the first time I learned that it was a completely different tire.

Studless tires are "The temperature rises in the daytime and the snow melts, and at night the temperature drops again and the melted snow freezes and the road surface becomes slippery.This tire is suitable for winter road conditions in Japan.

Even in ice burn, the control performance on ice is very high so that you can run, stop and turn without problems. HoweverStrong against snow and ice, but usually weak against dry and wet roads.

Winter tire Cayenne

One winter tire is mainly like Europe,Winter tires worn in areas that are rarely ice-burnedIt is. Although it is not strong against ice, it exhibits performance close to studless tires in snow and summer tires in dry and wet tires.(There was a description on the Michelin site)

In Germany, it is obligatory to change to winter tires when the temperature drops below 7 degrees Celsius. Because summer tires have rigidity and elasticity at high temperatures,If you run at low temperatures in winter, the rubber will become hard and the grip will not work.Because it is dangerous.

Certainly, in Germany, which runs on the Autobahn at 200km / h on cold winter days, it would be dangerous if you don't wear winter tires.

In fact, according to a test by a major tire manufacturer Continental,Braking distance from 60km / h at 7 ℃ or less, summer tires have a longer braking distance of 3m.There is also data that. Also, according to Porsche's official website,When braking from 80km / h, winter tires stop 12% shorter on wet roads at 3 degrees Celsius.It seems.

In Japan, there is no rule to change tires depending on the temperature, and it is hardly known in general, but I would like all owners of high-performance cars like Porsche to know it.

Why buy winter tires

This time my husband bought winter tires instead of studless tires, but when I asked him why

I want to go skiing on a snowy road from CayenneI don't know. I want to teach my daughters skiing soon.
I was thinking about tires, butIn the first place, I'm very dissatisfied with domestic studless tires.No.
I don't know about areas such as Hokkaido and Tohoku where ice burns and mirror burns are common, and the area around my house doesn't freeze so much even in winter. At most, it's a nearby ski resort that I go to several times a year. Moreover,There is rarely such a hard ice burn.
However, the feeling of that Gnyagnya tire, which is a domestic speed range Q standard studless tire,Road noise, poor straight-line stability, poor wet gripI can't stand wearing it during the winter. I think it will ruin the performance of the car.(My brother attaches Michelin's X-ICE to his car, which seems to be pretty good.)
Therefore,I chose winter tires instead of studless tires.I know that the ice burn performance will be lower than that of studless tires.
In this case, it suits the environment of Kansai where rain and miso are overwhelmingly more than snow, dry grip performance at low temperature, and above all, high speed stability is excellent, and Porsche's performance is not spoiled at all.
By the way,The 991.1 Carrera 4S I borrowed when I went to Germany on our honeymoon wore winter tiresHmm.
Even if I ran the Autobahn at 200km / h or more, it was okay at all, and the area around Neuschwanstein Castle where the snow was fluttering was okay, right?

I was talking.

Certainly, Germany on my honeymoon in October was quite cold, my rainy woman was unfortunately demonstrated, and Neuschwanstein Castle could not be seen at all in the thick fog.

Neuschwanstein Castle fog

Photographs of that time. The thick fog is amazing ...

The weather was flickering with snow, cloudy and rainy in Munich, but I didn't think it was scary to be in the passenger seat.

I mean, I wasn't interested in cars at that time, so I almost fell asleep ...(No way)

Porsche 911 Carrera 4S (first half of 991)

By the way, my Cayenne is a 20-inch Cayenne design wheel, but this timePurchased a nearly new 19-inch Cayenne wheel sold at Yahoo Auctions for winter tiresSeems to have done it. And the tires are Porsche approved "Michelin Pilot Alpine 5 SUV N0That's it.

Michelin Pilot Alpine 5

Michelin Pilot Alpine 5

According to her husband, it seems that it was quite difficult to find this Porsche approved winter tire, and it was out of stock no matter where I contacted, so I finally searched for it.There is one setI found a shop called "" and got it.

The price isUsed wheels cost about 150,000 yen, tires cost about 150,000 yen, and the total is about 300,000 yen.It seems. And the usualNishinomiya baseIt seems that Mr. (work is polite. Kodawari to the wheel balance is a god) sent the tires and wheels directly and installed them.

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  1. Funny

    We always have fun look.
    This year is the coldest wave in a few years, and it's the best winter for those who enjoy winter sports (although I'm not happy with the current times ...)
    I moved from Kobe to Hiroshima in April last year, and now I can go to the ski resort in just over an hour one way. When I was in Kobe, it took me about 3 hours to go to Hachikogen, so I can go there easily.
    Since it is impossible with the 981 Cayman GT4, I will go with a family car, but at the end of last year I switched from the Atenza Wagon to the Mercedes E220 All Terrain. At that time, I was wondering whether to choose winter tires or studless tires (since it has been a warm winter in recent years and I could hardly run on snowy roads in Kobe ...), but studless tires (Michelin X ice) emphasized performance in ice burn. snow 19 inches) was selected. As a result, the big cold wave came at the end of the year, and I have already gone to the snowy mountains five times this season (laugh) All terrain is my first 4WD, but the sense of security on the snowy road is an order of magnitude different from the 2WD. was. It was especially effective when starting on a slope on a snowy road. My two daughters (9 and 5 years old) are using Youtube and Nintendo Switch in the back seats, so I think they are relieved.
    I imagine that Cayenne will be more amazing, and snowy roads and Cayenne will be good pictures. I am looking forward to the report on snowy roads with winter tires.

    • MinaMina

      Thank you very much!

      > At the end of last year, I switched from the Atenza Wagon to the Mercedes E220 All Terrain.
      Thank you so much! !
      And the big cold wave came ... I'm very envious of being able to drive to the snowy mountains ...!
      Starting on a snowy slope, I had the experience of running on a snowy slope with an Audi A3 and being pushed from behind without climbing ^^;
      It's encouraging to be able to climb firmly without such a thing.

      > Imagine that the snowy road and Cayenne will be good pictures.
      Certainly, this is the impression that it is the correct way to use Cayenne (laugh)
      My husband is going skiing in February, so I hope he will take a lot of pictures at that time and feel the performance of the tires to the fullest ^^

  2. Bio

    Thank you for your always fun blog.

    One point My car teacher used to be a tire test driver, but in the case of winter tires, AutoSock is fine, so if you go to the snowy mountains, please have it on hand.

    From my experience, I think that when you go down a snowy mountain, the temperature drops in the evening and the road surface freezes, so you often rush into it.

    Surprisingly, I feel that there are many of them in 4x4 cars. It's the weight of the car and overconfidence.
    You may want to use the hill descent feature well, but be careful.

    • MinaMina

      Thank you very much!

      That's right!
      Certainly, I have a mysterious image that if it is a 4WD, it is safe even with some snow and ice ...
      If you don't understand the performance and conditions of the car, road surface and tires, it's dangerous especially in winter ...

      Thank you for telling me!
      Continue to thank you.

  3. RRS

    I am riding a heavy SUV in Hokkaido. For reference, we would like to inform you about the concept (evaluation) of winter tires here.

    Here, winter tires will be installed from the end of October at the earliest, from the end of November at the latest, to the beginning of April to Golden Week.
    * Since Hokkaido is large, the time when it starts to snow varies greatly between the south side and the north side (however, I think that the final installation rate is 100%).

    It is often mid-winter days below freezing all day long, so tires that can handle not only snow-packed roads but also frozen roads are required, and studless tires using soft rubber are required. Therefore, if you change from summer tires, you will feel a squeaky feeling, if you are on a curve, you will feel crunchy, but because it is soft, the ride (& sound) is surprisingly comfortable compared to sports tires, so the people of Hokkaido can accept it as a "seasonal tradition". I have become a constitution like that.
    In such an environment, when I go to an imported car dealer, there are advertisements for winter tires. When I thought "Is this a new genre?", There was a message saying "This tire is not a studless tire" and "It is not applicable if there is an instruction to install winter tires", and "It cannot be used in Hokkaido". I've come to the conclusion (although there are times when I don't advertise).

    Regarding studless tires here, each manufacturer has been pursuing "to make rubber as soft as possible, to keep it soft for a long time even if it deteriorates over time, and to improve water absorption performance". Therefore, there are quite a few negatives in terms of athletic performance, but on the other hand, recently I have come to see the advertising phrase "improved the feeling of crunching." After all, I think that there are many people who are concerned about that.
    In that respect, Michelin's rubber is not as soft as other manufacturers (the block does not stand so much), and it seems that the exercise performance is improved. For that reason, there is an image that it does not work on frozen roads (especially the curve is scary), and even if you go to a car supplies shop in Hokkaido, the exposure of the sales floor is small compared to other manufacturers.
    However, Michelin used to sell "Maxiglass" tires, which are softer and still have demon grips (the life was short), and other manufacturers have followed suit. I have one.

    For me, if the snow pressure or sherbet level is the center and there is not much use of frozen roads, I think Michelin (X-ICE) is good.
    (I don't know if it's true) When it comes to "winter tires are not winter tires" (though Japanese is strange), there are "winter tire installation instructions" and "non-slip installation instructions" that often appear in Honshu. In that case (in Hokkaido, it is assumed that everyone wears it, so it will not appear except at the turn of the season), I am worried that it will not be a problem.

    By the way, I'm Bridgestone's DM-V3, and I'm Gnyagnya. Lol

    • MinaMina

      Thank you for telling me a lot!
      I have no chance to know about the tire situation in Hokkaido, so I thought that real information was very interesting.
      Unique to snowy countries, the types and exposure of tires sold in stores are completely different!

      But when I saw the news in such a heavy snowfall on sherbet,
      The locals are usually driving in the car without being afraid,
      After all, it's amazing for people in Kansai ...! As expected ...! I will think.

      Someday, I would like to experience running in the snow of Hokkaido ...!

  4. MT mania

    I am always looking forward to reading it. Since it was a topic of skiing and cars, I would like to comment.
    I put the studless Yokohama ice GUARD SUV on the Forester 6MT for the first time and went to Shiga Kogen during the New Year holidays and to the bees at the beginning of the year.
    Not only skiing but also driving on the road was extraordinary and fun. Because it is studless, the speed is suppressed on the road (almost high speed), and the curve slows down (do not scrape the side of the tire as much as possible), so even an SUV with low horsepower feels a little stress. I'm a beginner on snowy roads, so I was relieved, but which one should I take?
    Although it was in the cold weather, I felt a little dangerous only on the mountain road from Shiga Kogen Kambayashi and from the foot of the bee. A 4WD minivan that is about to go downhill in the back due to heavy traffic jams on the downhill Prado and the wheels coming off the side groove. There were some brave people who couldn't imitate Land Cruiser.
    We are also looking forward to snow road impressions (preferably ski resort impressions).
    Also, do you have an undercoat as a measure against snow melting agents?

    • MinaMina

      MT enthusiast
      Thank you for always seeing the blog!

      Hachikita on the Shiga Kogen!
      I used to go there a long time ago when I was young, and I want to go there for the first time in a while ...

      More than wearing tires such as studless tires
      After all, I thought again that awareness of safe driving is the most important thing.

      Even those who are boldly challenging
      Someday you may have an accident and
      It's scary to overdo it><The other day, I ran a little on a snowy road, but there wasn't much snow, so I hope to have the experience of running again when it's snowing! ^^ I haven't done any undercoating. We are looking forward to hearing from you!