10-02-2017, 08:58 AM | #1 |
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Do wheel spacers affect handling?
Hi
I'm thinking of getting wheels spacers for my G30 759M 20" wheels (5mm front and 10mm rears). my question is since that alters the factory rear/front track width slightly, would that cause under or over steer or change handling of the car in anyway. Or would you suggest getting same width spacers for front/back? Sorry had to post here since G30 forum is not as active. Thanks!!! |
10-02-2017, 09:59 AM | #2 |
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Loaded question(s)... that is awesome. In your situation, probably minimal effect, but better aesthetics.
Here are a couple of videos that explain the the changes that happen when you modify your track: |
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10-02-2017, 11:35 AM | #3 |
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Whether it oversteers or under steers should also depend on your offset as well, especially if you're tracking your car. So it'll be a combination of the widen stance plus the offset you're running. But if it's everyday driving I'd assume there will be minimal difference.
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10-02-2017, 02:20 PM | #4 |
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My fear of spacers has always been any kind of steering wheel vibration at higher speeds on highway...sounds like its not an issue.
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10-02-2017, 04:35 PM | #6 |
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Hubcentric ones with the specs you are interested in will not affect handling in your case
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10-02-2017, 04:54 PM | #7 |
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Just make sure your lug bolts are the correct length for the spacers you get.
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10-02-2017, 05:37 PM | #8 | |
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but again I asked for it so thanks!!! |
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10-02-2017, 06:12 PM | #9 | ||
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10-02-2017, 10:07 PM | #10 | |
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Spacers are going to provide mostly aesthetic benefit, and the widths you're planning to add will make negligible difference in performance (positive or negative). So go live a little and enjoy your unique ride. For the record, I've got 17.5mm spacers all around on my F36. |
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10-03-2017, 12:28 PM | #11 | |
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10-03-2017, 02:06 PM | #12 | ||
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10-03-2017, 02:48 PM | #13 |
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I haven't added spacers to my M235, but I did add new wheels 18X8 all around vs the stock 18X7.5 and 18X8 setup. The new wheels have 10mm more offset so it's just like running 10mm spacers. What I've noticed is that the car are much more sensitive to trammeling from ruts in the road. Overall, if the road has ruts or is bumpy, the car can be more of a handful as the suspension, especially the rear, has far more tendency to steer itself. It's proof of just how design BMW considers in their suspension and how operating the suspension outside of the designed parameters can have negative consequences.
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10-05-2017, 02:44 PM | #14 | |
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10-07-2017, 11:32 AM | #15 | |
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I do find the car more tail happy, but I'm not sure if it's because the engine has broken in (15K miles, feels much stronger than with sub 5K miles) or I'm just more comfortable with applying more throttle and the car itself. I want to restate that this issue is only noticed on rougher pavement, typically while the car is turning, slow speeds or highway speeds. |
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10-07-2017, 09:13 PM | #16 |
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the changes are so minimal that you will only notice the differences on a track.
i didn't use spacers but i did get wider VMR wheels and H&R springs. The biggest change i noticed was my MPG dropped by about 2-3. This is partly because of more tire = more friction. but also the tire is now pushed out disrupting airflow around the car.
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10-08-2017, 03:09 AM | #17 |
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More positive offset (which is what most modern cars run) means the wheels are further inset, whereas spacers actually reduce positive offset. Unless you actually meant your new wheels have 10mm LESS offset.
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10-08-2017, 11:23 AM | #18 |
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10-08-2017, 11:25 AM | #19 |
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The problem is these cars are designed with a specific offset in mind. When you start pushing the wheels outwards, wider tires, etc. you're going to feel the consequences. It's not a huge deal, but to say there are no side-effects would not be a true statement. People love to overstate the positives of mods, but rarely elaborate or bring to light the negatives. The negatives may be less apparent if you're running less aggressive tires as the softer tread blocks will reduce some of the dartiness, trammeling, etc.
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10-09-2017, 02:35 AM | #20 |
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Offset matters more on the steering axle. The kingpin angle of the strut combined with wheel offset determines the scrub radius. When I was in the habit of changing wheels for a more aggressive stance on my earlier cars, I almost always found the car handled best on OEM offset wheels.
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11-21-2017, 10:41 AM | #21 |
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I went ahead with 15mm in the back and 10mm spacer upfront.
I could tell the difference in ride quality right away. Its definitely not as smooth... you can feel small imperfection in the road just a tad more now. Steering feel and response is the same so no change there. |
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