[dianebrat]

That makes sense, but someone also needs to show all-seasons vs snows on an AWD

[ventjock]

Originally Posted by dianebrat

That makes sense, but someone also needs to show all-seasons vs snows on an AWD

I had to drive to work this past Monday in Boston (I think we got around 14inches of snow), I have an xDrive with blizzak ws80's and the grip was amazing (I had the DSC off as well). If anything I was getting frustrated from seeing so many cars driving so slowly and slipping on the roads.

[mr_lab_rat]

Too bad the test in the original post didn't have all season tires. I'm sure they would be significantly worse than winter tires but I would like to see the difference.

[RobinLegin]

On the subject of winter tyres, is there any truth that if you use winter tyres all year round, you will wear out the wheel bearings? I raise this because my eldest who runs an XC90 Volvo has put Michelin Cross Climates on his car. His local garage state if these are run in the warmer weather they will accelerate the wear on his car’s wheel bearings.
Anyone scientific out there who can advise on this?

[Jorix]

Originally Posted by MJE60

Hi
Where did you read this? I would like to know more, I’d there an article?
Thanks

Edit: I just saw that the new 20i xDrive appeared on auto-data - https://www.auto-data.net/en/bmw-x1-...eptronic-35946

[MJE60]

Originally Posted by Jorix

Edit: I just saw that the new 20i xDrive appeared on auto-data - https://www.auto-data.net/en/bmw-x1-...eptronic-35946

Thank you

[MJE60]

Originally Posted by RobinLegin

On the subject of winter tyres, is there any truth that if you use winter tyres all year round, you will wear out the wheel bearings? I raise this because my eldest who runs an XC90 Volvo has put Michelin Cross Climates on his car. His local garage state if these are run in the warmer weather they will accelerate the wear on his car’s wheel bearings.
Anyone scientific out there who can advise on this?

Basically winter tyres have a much softer rubber compound and in hot weather this can lead to excessively soft/pliable tyres with considerably increased braking distances (ADAC - up to 16m at 100kpmh/52ft @ 62 mph) so regardless of wear and tear it can be dangerous. The softer the compound (softness increases with temperature) the higher the tyre rolling resistance which in turn increases the torque needed to turn the wheel and places direct additional load on the wheel bearings whilst reducing fuel economy. Higher bearing load will accelerate wear but whether materially so I do not know. The performance threshold for Summer v Winter tyres is approx 7°C (45°F). I do not know at what temperature ADAC tested winter tyre braking distances in hot weather but assume there is a direct correlation between extra distance and increased temperature.

[RobinLegin]

Guess I will change over my winter tyres after this cold spell. Possibly late next week.
Last year of course we had the Beast from the East late March. I was one of the few getting around without any problem. Be just my luck for the weather to turn again just as I put my all weather tyres back on!