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Old 01-22-2019, 02:20 AM   #1
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New Rims - which size spacers?

Hello everyone,

I need a quick answer because I'm in doubt.
I bought some new rims, but they were a different size, which I wasn't aware of.
But they can't be fitted due that they are rubbing up against the suspension.
Is it enough with spacers? And which sizes?

Old rims:
Front 7.5Jx18 ET 50
Back 9Jx18 ET 52

New rims
Front 8Jx18 ET 50
Back 10J18 ET 65

I hope for some quick help!

Best regards
Kim

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Old 01-22-2019, 04:13 PM   #2
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You need a pair of 15 mm spacers to bring the rear wheels out to stock specs.
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Old 01-23-2019, 03:44 AM   #3
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Is it possible for you to let me know how you came to that conclusion?

Best regards
Kim
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Old 01-23-2019, 04:17 AM   #4
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The backspacing is the number flowing the wheel dimensions that are stamped on the wheel; 7.5J x 18 is the width and diameter of the wheel, the following number (ET 50) is the spacing.

The spacing on your rear wheel (original) is 52mm, the new wheel is 65mm. That means the new wheel will be 13mm closer to the center of the car. Thus, 15mm spacers will bring it back out to near the original spacing.

One other thing to consider is that the new wheels are wider. If the original wheels had the tire near rubbing, then adding width will make it worse if the new wheels have the same spacing.

Hope this makes sense, and helps!
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Old 01-23-2019, 04:51 AM   #5
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Quote:
Originally Posted by Racer Boy View Post
The backspacing is the number flowing the wheel dimensions that are stamped on the wheel; 7.5J x 18 is the width and diameter of the wheel, the following number (ET 50) is the spacing.

The spacing on your rear wheel (original) is 52mm, the new wheel is 65mm. That means the new wheel will be 13mm closer to the center of the car. Thus, 15mm spacers will bring it back out to near the original spacing.

One other thing to consider is that the new wheels are wider. If the original wheels had the tire near rubbing, then adding width will make it worse if the new wheels have the same spacing.

Hope this makes sense, and helps!
You also need to take width into account. A 10" wide wheel with 50 offset will have less clearance than a 8" wide wheel with the same offset.

To answer your question, for the rear you'll actually need about a 25mm spacer to maintain stock clearance. According to this calculator, your new rear wheels have 26mm less inner clearance. Whether or not you could get away with a smaller spacer I couldn't say, however.

https://www.1010tires.com/Tools/Wheel-Offset-Calculator#
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Old 01-23-2019, 05:39 AM   #6
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Well.. can you guys see why I'm confused?

I've heard that you could put on 10Jx18 on a 986 - but I can't seem to find which spacers fit.

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