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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum Which winter wheels?
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      08-13-2011, 07:50 AM   #1
RussW
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Which winter wheels?

Hi, I\'ve got a 520d with 17\" wheels and called into the local BMW dealer today to enquire about the winter wheel packages.

The 17\" winter tyres come on style 327 alloys, whereas the 18\" have the option of either style 281 or 329. The salesman said he wouldn\'t recommend switching to a larger wheel because of how the break pads wear. Is this true? Is there anything else I should be aware of if I went to a larger wheel size for my winter tyres? I prefer the look of the 281 / 329 over the 327 so ideally I\'d like to go with one of these.

Thanks for any advice.
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      08-13-2011, 10:59 AM   #2
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I Have Team Dynamics 1.3 Pro-Race on order, 8 *18 front 10 * 18 rears ET 35 all round.
With Dunlop winter sport 3D Run-Flats size 245/45/18. Much better and cheaper and lighter than BMW offerings.
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      08-13-2011, 03:24 PM   #3
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Given the same overall wheel size, where's the scientific evidence that a different rim size / sidewall ratio would affect the brake pad wear please?
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      08-13-2011, 03:35 PM   #4
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Quote:
Originally Posted by Gran Turismo View Post


Given the same overall wheel size, where's the scientific evidence that a different rim size / sidewall ratio would affect the brake pad wear please?
One word "inertia". More energy to accelerate, more energy dissipation, to slow down.

Now how much difference in percentage terms for a given wheel size/weight, tyre weight that makes... anyone do the math?

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