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19" to 18" wheel size change considerations?

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YOUR RESEARCH19" to 18" wheel size change considerations?

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Recommend tire sizes wrapped around those wheels

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Suggestion

However, make sure you have the correct OEM recommended tire sizes wrapped around those wheels, because a lot of these newer cars have wheel speed sensors that pick up data.

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19" to 18" wheel size change considerations?
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Leading evidence: 'Recommend tire sizes wrapped around those wheels' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend tire sizes wrapped around those wheels' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Use spacers

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Suggestion

I am not familiar with turbos but on standard 996's it is generally acceptable to use spacers that range from 7mm to 15mm .

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19" to 18" wheel size change considerations?
Frequently discussed actions (2)

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Recommend tire sizes wrapped around those wheels

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Suggestion

However, make sure you have the correct OEM recommended tire sizes wrapped around those wheels, because a lot of these newer cars have wheel speed sensors that pick up data.

Original post Read captured discussion
19" to 18" wheel size change considerations?

Use spacers

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Suggestion

I am not familiar with turbos but on standard 996's it is generally acceptable to use spacers that range from 7mm to 15mm .

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19" to 18" wheel size change considerations?
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POST 1 / ORIGINAL POSTEROriginal post

My 2002 996TT came with aftermarket 19" wheels. I've purchased a set of 18" Porsche Turbo Twist wheels to bring the car back to "stock". Are there any other things that need to be done with the wheel size change? Does the speedometer/odometer need to be re-calibrated? Are wheel spacers a good option for a street-driven car? Any advice would be appreciated.

POST 2Original post

You are going back to stock wheels/tires so no calibration needed . Once you get the new setup installed you can determine if there is too much space between the tires and the fender lips . At that point you can think about spacers . I am not familiar with turbos but on standard 996's it is generally acceptable to use spacers that range from 7mm to 15mm . You also have to go with longer wheel bolts and/or add wheel studs .

POST 3 / ORIGINAL POSTEROriginal post

Thanks for the response. Sounds like it will be very straightforward.

POST 5Original post

Like others have indicated, you should be good to go if you're going back to OEM. However, make sure you have the correct OEM recommended tire sizes wrapped around those wheels, because a lot of these newer cars have wheel speed sensors that pick up data. The last thing you need is your transmission acting up because the sensors have picked up false data.

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