Winter Tyres

Discussion in 'General chat' started by TNTTNT, Feb 3, 2020.

  1. TNTTNT
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    TNTTNT Site Supporter

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    Hi,

    I have a G31 540i xDrive, and had some lightly used18 inch alloys, with Goodyear Ultragrip 8 winter tyres, delivered.

    All the wheels are the same size, but my summer 20 inch alloys have larger rear wheels.
    My tyre fitter says being the wheels being the same size for winter tyres is not a problem, and may even be advantageous.

    Is it standard practice to have all winter wheels the same size?

    Hopefully to give something back, I can advise anyone looking for a set of winter alloys not to go below 18 inches, if they have M Sport brake callipers; 18 inches just fitted; phew!
     
  2. a.s.uk
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    a.s.uk

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    It’s called a square set up
    All 4 wheels are the same width
    It’s normal...
    See you sticker in the door post for confirmation...


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  3. Mieke
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    Mieke WARLORD Site Supporter

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    I have the same arrangement. My 19" summer wheels and tyres are staggered, with 205 / 255 front and rear. Whereas my winners are all 18" 205's on a square setup. The difference in the various tyre widths is taken care of by the OFFSET dimension of the wheel concerned.
     
  4. TNTTNT
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    Thanks very much for your kind time to advise. I was worried there was a mix up, but will now enjoy worry free.

    I’m really keen to see what winter tyres will do on ice with 4 wheel drive as well. I had them before, but on a rear wheel drive 535d F11N Touring,

    Many thanks again.
     
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  5. Cotswold BMW
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    Perfectly normal (y)

    Big wide tyres can spread your weight too much in wet/snow conditions. A thinner tyre puts more weight onto a smaller patch = more grip
    In the dry, wider at the rear should kill off some of the over steer :whistle:
     
  6. markyboyt
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    markyboyt

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    I think in the case of snow tyres wider can be beneficial as you have a grippier tyre, can’t remember where I read it though. I think it was something from Continental
     
  7. markyboyt
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    markyboyt

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    Incidentally I’m in Norway for a few days and they’re running studded tyres, wow, windy roads of compacted snow and ice and they’re tanking round at 80-90 km/h no bother, tailgating and overtaking.
     
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  8. Cotswold BMW
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    Cotswold BMW WARLORD Site Sponsor

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    Depends on how lose it is I suppose. On lose sand or snow you'd want big volume tyres (with low pressures) :salut:
     
  9. a.s.uk
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    a.s.uk

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    Metal studs into hard compact snow and ice... what’s not to like..


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  10. markyboyt
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    Yes sand would be different but with snow, especially soft snow you would have a big wide tyre full of snow which is what makes them grip to the snow on the ground. I’d imagine the more difficult part of having staggered winters would be trying to get the same tyre front and back.
    Also thinking about it, I wonder if having different widths then affects the levels of grip front to rear in snow and ice which I guess could then unsettle the car. Maybe that is another factor in them being square set ups usually.
     
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  11. Peter
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    Don't forget in the UK, most of our snow is not usually good 'solid' cover. More likely to be slush. In that case we want ta narrow tyre which will suffer less from slush planing. Similar to how a wider tyre will aqua-plane, too wide a winter tyre on slush will lose its ability to keep contact with the road. Nokian state that slush planing is more dangerous than aqua-planing, due to the slush depth and its higher viscosity.

    A square set up is usually the best compromise, the better balance 'front to rear' on a good chassis, neutral handling.

    Peter
     
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  12. markyboyt
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    Yes that does make sense especially for the uk as you say. So many factors to consider. When I had my E92 I had square set up 17’s.
     
  13. kleynie
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    Oops, I’ve just bought a staggered winter set up where the rears are 295 section! But probably still better than summer tyres.
    This will be my first experience of winter wheels, bring on the snow!
     
  14. Mieke
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    Mieke WARLORD Site Supporter

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    I haven't even fitted my winters yet. I doubt that I'll need to this year. :whistle:
     
  15. a.s.uk
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    a.s.uk

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    today at easy Midlands airport
    What were you just saying..

    [​IMG]


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  16. Mieke
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    Sunny day today beside a Cheshire Mere. :whistling: :ROFLMAO:


    Sunny Cheshire.jpg
     
  17. mach one
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    mach to dol.jpg

    talyllyn pass Monday afternoon picture from Facebook

    the tanker at the front of the shot spun out on the next hill and ended up sideways across the road blocking the pass
     
  18. a.s.uk
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    a.s.uk

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    To be fair to you... I’ve not seen Cheshire get much snow.... ever.. and if it dies most people can afford to spend the day at home, while the butler goes out in the RR, if supplies are needed...or so my colleagues tell me...


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  19. Earby
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    I have a 530e that’s just coming up to 3 years old. My normal wheels are 19”, winter 18”. My local dealer, who I have a great relationship with, always advises me an inch narrower for winter wheels. I’m changing my car next month for an X5 45e, so my winter wheels will be no use to me. If anyone knows of someone wanting to buy a set with good condition tyres at a bargain price please let me know. Last time I had to sell my winter wheels I tried selling them on eBay but encountered a lot of total time wasters.
     
  20. TNTTNT
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    Thanks for your reassurance on narrower tyres.

    I'm in the same position, where I have a set of MSport winter alloys off the F11N 535d. I'm going to try eBay, but daunted, having never sold on there before. There are tyre traders on there, so it may be worth contacting one directly. I guess the price would allow the trader to make some margin.
     

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