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04-13-2012, 09:03 AM | #1 |
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Moving to 20" wheels
Hi everyone. I have a 2012 535xi with m sport package. It has the 19" wheels with RFT's. I swapped the tires out immediately to Michelin non RFT's. Question is I am thinking of going to a 20" wheel and tire package. Will I notice a slower pickup on the car? When I had my E63 I went from an 18" wheel/tire to a 20" wheel/tire Iforged wheel. I could notice that it seemed more "sluggish" on pickup. Any thoughts?
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04-13-2012, 09:35 AM | #3 |
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It all comes down to un-sprung weight. If you can keep your 20" setup's weight close to what your stock 19's weigh (tire and rim) then you shouldn't notice much of a difference.
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04-13-2012, 10:19 AM | #4 |
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+1, keep the weight close, and you shouldn't notice a difference. I believe the general rule of thumb is that every difference in unsprung weight is equal to a 10 fold difference in actual weight. For example, 5lbs difference in weight of a wheel/tire combo, times 4 =20 lbs. Equivalent to an overall weight difference of 200 lbs of the vehicle.
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04-13-2012, 10:47 AM | #6 | |
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Tires: Manufacturer website? Tirerack?
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04-13-2012, 11:01 AM | #7 |
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Here's a forum member in your same situation going from 19" M sports to 20" wheels.
He stated that it was a 20 lbs reduction per corner! http://f10.5post.com/forums/showpost...62&postcount=1 |
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04-13-2012, 11:04 AM | #8 | |
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04-13-2012, 11:06 AM | #9 |
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04-13-2012, 11:18 AM | #10 |
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Per corner??? I haven't actually weighed my wheels, but I take them off for regular cleaning and I don't think a complete wheel/tyre weighs all that much more than 20 lbs. I reckon 5 lbs a corner (20 overall) sounds a bit more credible.
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04-13-2012, 11:48 AM | #11 | |
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Here's what my 20" MORR VS8.2 weighed with Toyo Proxes T1 Sport. Front Rear |
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04-13-2012, 12:41 PM | #12 |
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I wasn't doubting your word, more that of the originator. I must say that I'm amazed at the weight of your wheels and I'll check mine when they're next off the car - maybe I'm stronger than I think
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04-13-2012, 01:24 PM | #13 | |
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But I do think a saving of 20lbs per corner sounds like a lot. I'd expect 10-15 lbs.
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