Conosco l’intera “regola dei 7°C” per quando la gomma degli pneumatici invernali inizia a funzionare meglio degli pneumatici estivi, ma con il tempo attuale sembra presupporre che tu stia guidando con temperature diurne più elevate. In realtà, guido per la maggior parte durante il freddo tragitto mattutino.
D’altra parte, usiamo pneumatici chiodati e ho sentito che in realtà a queste temperature più calde hanno un’aderenza peggiore rispetto agli pneumatici estivi sull’asfalto asciutto. In più c’è tutta la faccenda dei danni stradali. Se aspetto che la temperatura diurna scenda sotto i 7°C, la mattina potrebbe già essere a -5°C e sto scivolando con le gomme estive. Ma se cambio ora, consumerò i miei tacchetti sull’asfalto nudo potenzialmente per settimane?
Modifica: per tutti coloro che non conoscono la “regola” dei 7°C, ha a che fare con le mescole di gomma. La gomma estiva si indurisce e non può fornire una presa ottimale, indipendentemente dal fatto che ci sia neve, pioggia o meno, la chiamano transizione vetrosa. E la gomma invernale è realizzata per essere più morbida con queste temperature in modo da poter aderire e avere trazione sul bagnato, sulla neve e, rispetto agli pneumatici estivi, anche sul ghiaccio. Quindi con i pneumatici senza chiodi probabilmente cambierei già adesso poiché le temperature rientrano nella finestra dei pneumatici invernali, ma i chiodi rompono la strada e ciò significa che stiamo guidando più a lungo con pneumatici estivi nel loro range di lavoro non ottimale.
https://www.nokiantyres.com/tips/driving-tips/when-to-put-on-winter-tires/
‘Installare gli pneumatici invernali prima che arrivino le temperature gelide. Come buona regola pratica, valuta di passare agli pneumatici invernali quando la temperatura scende costantemente a circa 7 gradi Celsius o meno.’
https://www.continental-tires.com/products/b2c/tire-knowledge/summer-or-winter-tires/
“Quando la temperatura stagionale scende sotto i 7 °C (46 °F), è il momento di passare agli pneumatici invernali.”
When do you actually change to winter tires (studded)?
byu/Euphoric_Coffee3463 inFinland
di Euphoric_Coffee3463
20 commenti
I have never heard of that 7 degree rule. Day time temperatures are already below 7 degrees here, and the first subzero night is coming up next week’s Tuesday. After that it stays above zero again.
I usually change tires when it is below zero multiple days in a row and/or there’s proper snowfall.
I change my tires when I’ll almost skid and crash to the roundabout sidewall the first time for the winter. Then you know there is too much black ice and its time to change them.
Before that its pretty much useless especially when you have studded tires. They just wore out faster and are hella noisy
Never heard of 7°C rule either. I change my tires when I have to drive at below zero degrees. Usually late October. I rather wear my studs down than take risks with myself or others.
I live in south. 2nd or 3rd week of November.
I usually change when legally allowed. It helps me get a better wear pattern on both pairs and I work shift so not interested in a 4-5am surprise with 10cm snow.
First time the weather service shows snowfall in weather forecast. Regardless of whether it actually snows then.
Winter tire season starts November 1 and lasts to March 31, this is the time period you’re allowed to use winter tires if weather requires.
The proper way is to wait until there is snow on the ground, then being forced to take bus to work, then change to winter tires when ground is slushy and wet from melting snow.
Since I drive mostly at night.. I’d say October November in my own case.
What 7 degrees rule? Been here 25 years and never heard of it.
I had winter tires put on my camper van already in the beginning of this month. There was a chance that I needed to take it north. Now, I will next have stud less winter tires put on my EV next week, my wife’s car after that
Usually in late October. Varies somewhat between years.
Never heard of a 7 degree rule.
What 7 degree rule? I’ve never even heard of that. I personally wait until winter tires are mandatory before I switch and just rely on my god-like driving skills to stay on the road until then. It’s worked well so far
I usually look at the projected weather and after there are a few 1 or 0 degrees there I will switch. I drive alot during early mornings or nights
If i had studless tyre i would have them probably already on, but i have the studded and i hate them so i am going to be putting them on probably after there’s snow already on the ground
Wonder if that 7C rule is based on some middle-European countries where “winter tires” are not 3PMFS rated. Finns view this as an on/off thing with one, and only one factor: is there snow or ice on the road or not.
I keep checking the weather forecasts and change when there’s even a small risk of ending up on icy roads.
I’ll be changing my tyres tomorrow.
But I live in the North.
Never heard of the 7° rule either. Here for 30 years. I keep an eye on the weather, and try to change a few days before the first snow is forecast. Generally I am earlier than many, but I prefer me and my family to be safe.
If the temperature goes to freezing, or if there’s any ice or snow on the ground. If you think that there’s a very good chance that you will drive on ice or snow soon, it’s time to change.
This 7°C rule isn’t really anything to go by for studded tires. Don’t follow that.
I usually change mid-October (Helsinki region) to winter tyres and mid-May back. I have friction tyres though. I prefer to stay on the safe side. In Helsinki yhis year, I would say it is time to change sometime this week or next week.