Low profile tyres and rain...?
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I had a similar set up on my 540 and had absolutely no problems, except in snow !! As mentioned by previous posters the tires work quite well until it gets closer to the freezing mark . I am not going for a winter set here because I can use my other car ( we do get a bit of snow in Vancouver...occasionally ).So far the tires/wheels( 172s and Contis )on the new car have been great in the rain .
Good luck
Good luck
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All tyres will aquaplane given the right conditions and the natural aquaplane speed is in the order of 9X the square root of the tyre pressure. Hence that is one reason for maintaining the correct tyre pressure! (and NOT driving on slicks 
)
As previously posted, increasing the width of a tyre although looking good is detrimental to the handling of a vehicle (in the dry as well as the wet!) as the 'footprint' pressure goes down in relation to the increase in area. This can also compromise a tyres ability to 'cut' through standing water.
)As previously posted, increasing the width of a tyre although looking good is detrimental to the handling of a vehicle (in the dry as well as the wet!) as the 'footprint' pressure goes down in relation to the increase in area. This can also compromise a tyres ability to 'cut' through standing water.
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You need good tires, the best you can have is the HANKOOK S1 Evo not for that was use them as partner, because they are really the best with 285/25/20s and @ 240 km/h in such heavy rain as the auto-wiper was at its peak I still could even take fast turns, no slips no slides no aquaplanning, also at high speeds you need to be carefull but already @ 100 km/h and when you have a small part where you loose part of grip do not steer nor counter let it go through... then when you have the grip again do what you have to fast.
I always check the pressure for mine it is extreme front: 2,8 bar rears: 3 bars. Also when pressure is ok you have more grip. Many ppl frigthened me that HUGE lips 7 cm will slip and collect all rain and car will shake and I am sorry it never happened with mine ever. Good luck.
I always check the pressure for mine it is extreme front: 2,8 bar rears: 3 bars. Also when pressure is ok you have more grip. Many ppl frigthened me that HUGE lips 7 cm will slip and collect all rain and car will shake and I am sorry it never happened with mine ever. Good luck.
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Originally Posted by daven' post='479969' date='Oct 10 2007, 05:02 PM
All tyres will aquaplane given the right conditions and the natural aquaplane speed is in the order of 9X the square root of the tyre pressure. Hence that is one reason for maintaining the correct tyre pressure! (and NOT driving on slicks )
As previously posted, increasing the width of a tyre although looking good is detrimental to the handling of a vehicle (in the dry as well as the wet!) as the 'footprint' pressure goes down in relation to the increase in area. This can also compromise a tyres ability to 'cut' through standing water.
)As previously posted, increasing the width of a tyre although looking good is detrimental to the handling of a vehicle (in the dry as well as the wet!) as the 'footprint' pressure goes down in relation to the increase in area. This can also compromise a tyres ability to 'cut' through standing water.
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Originally Posted by Felix' post='480072' date='Oct 11 2007, 03:36 AM
If wider tires make the handling worse even in dry conditions then I wonder why F1 cars have such barrels on their axles, probably for the looks only.
From many moons ago a (real, not one of these silly toy ones!) mini cooper running on the standard wheels handled better than the ones with rollers around the side streets
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Originally Posted by sx125' post='479810' date='Oct 10 2007, 02:25 PM
Completely wrong, the wider the tyre the more you are to aquaplane!!! Ever heard of aquaplane with your bike? 
In wet conditions a minimum of 4mm of thread is required - even with 225 tires.
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Although it is true narrower tires handle better in WET conditions, it is completely false they handle better in dry conditions. Performance defined as handling, cornering. Acceleration technically is increased with narrower tires due to less friction created by the tires HOWEVER in cars that have tons of power-the little bit more friction created by the tires is actually what allowes them to have traction to harness all that power and actually get faster/better times. So in performance cars you are balancing tire width with two factors. The amount of power you have in you car and the width needed to get that power to the ground v. choosing the narrowest tire that actually does provide enough traction.
As far as cornering and handling wider tires always provide greatly improved handling again due to the more surface area which creates more friction or "grip" as most call it around the twisties etc.
That is why in our e60s we do not have all that wide of tires because the width on our cars are generally enough to lay the power to the road. Any wider would just slow the car down since we already have enough friction to get the car moving without spinning out the tires.
And oddly enough bmw's CAn defy the laws of human physics which in many situations is what people equate with defying the laws of true phsyics.
The majority of times a care loses control is not due to the law of physics-rather it is because the law of human physics. For example in wet weather if you put yourself into a spinor some other maneauver that 9/10 people cannot come out of, it is because humanly we are unable to make all the exact necessary adjustments to throttle, brakes, and steer to compensate for the forces at hand. However DSC or any good traction with yaw sensors take over control of steering, braking and throttle with a computer that IS able to make every single adjustment needed in teh right parts of the cars. Essentially providing the exact forces needed on all dimensions of the car touching the ground to compensate for the forces that are causing the car to be out of control.
So while it is impossible to defy the true law of phsyics-that is rarely the cause of a car being out of control. It is the law of human physics which can be altered. Of course if the forces at hand causing a car to be out of control such as at high speeds or completely zero traction such as ice-then times like that actually the dsc cannot overcome true laws of phsyics.
As far as cornering and handling wider tires always provide greatly improved handling again due to the more surface area which creates more friction or "grip" as most call it around the twisties etc.
That is why in our e60s we do not have all that wide of tires because the width on our cars are generally enough to lay the power to the road. Any wider would just slow the car down since we already have enough friction to get the car moving without spinning out the tires.
And oddly enough bmw's CAn defy the laws of human physics which in many situations is what people equate with defying the laws of true phsyics.
The majority of times a care loses control is not due to the law of physics-rather it is because the law of human physics. For example in wet weather if you put yourself into a spinor some other maneauver that 9/10 people cannot come out of, it is because humanly we are unable to make all the exact necessary adjustments to throttle, brakes, and steer to compensate for the forces at hand. However DSC or any good traction with yaw sensors take over control of steering, braking and throttle with a computer that IS able to make every single adjustment needed in teh right parts of the cars. Essentially providing the exact forces needed on all dimensions of the car touching the ground to compensate for the forces that are causing the car to be out of control.
So while it is impossible to defy the true law of phsyics-that is rarely the cause of a car being out of control. It is the law of human physics which can be altered. Of course if the forces at hand causing a car to be out of control such as at high speeds or completely zero traction such as ice-then times like that actually the dsc cannot overcome true laws of phsyics.
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