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Above: I have 20" Carrera wheels with spacers (15mm back/7mm front). I later added an X73 sport suspension which lowered the car, an closed the wheel gap even more.
 

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Hi All, I'm getting my 981 next week (currently have a 987).
And I will definitely upgrade the rims to Carrera S or Carrera Sport style (comes w/ 18").

Can you please show your pictures and experience please - although it's clear 20" will look better I prefer 19" for a smother ride, I hope to see how the 19" fill the wells vs. the 20".

Thanks in advance!
20"....definitely
IMG_20191123_110049.jpg
 

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My 981S started on 20's. I wanted to change to 19's, but the tires I wanted only came in 20 for the width & profile I needed. The rule I have used is not to change the old to new circumference (speedo error) by more than 3% front to back. Meaning the front and back could both go up by 4% and your PSM should not recognize it, although your speedometer would be off by 4%. But if the front went down by 2% and the rear went up by 2%, then your PSM may start reacting to a perceived problem. check www.willtheyfit.com.
I ended up with HRE R101LW that were a bit wider than stock, to accommodate a wider tire.
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271580
271581
 

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2013 Porsche Boxster S Model w/PDK
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Keep in mind also that rubber will be more expensive for 19 inch wheels vs 20. 19's are becoming a less desirable size and odd ball so to speak.
 

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??? All of the available tires are the same diameter and therefore height; they have to be or the speedometer and the stability systems won’t work properly. The difference is the tire sidewall height and the wheel diameter. The bigger the wheels the shorter the tire sidewall.

The tire/wheel combos will all fill the wheel well the same. If you want less gap above the tire, you need to do it with suspension.
Before you change the wheels to a larger wheel you might want to check on top rated tires in 18" versus the 19" and the 20". Just a thought also the 18" are more readily available I believe. If costs in not a consideration buy what you like.
 

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Discussion Starter #29
My 981S started on 20's. I wanted to change to 19's, but the tires I wanted only came in 20 for the width & profile I needed. The rule I have used is not to change the old to new circumference (speedo error) by more than 3% front to back. Meaning the front and back could both go up by 4% and your PSM should not recognize it, although your speedometer would be off by 4%. But if the front went down by 2% and the rear went up by 2%, then your PSM may start reacting to a perceived problem. check www.willtheyfit.com.
I ended up with HRE R101LW that were a bit wider than stock, to accommodate a wider tire.
View attachment 271578 View attachment 271580 View attachment 271581
Super useful thanks. And amazing looks


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Keep in mind also that rubber will be more expensive for 19 inch wheels vs 20. 19's are becoming a less desirable size and odd ball so to speak.
I agree the industry will continue marching toward larger wheel sizes, but for the near future, the 19"s are definitely less expensive than 20s, in similar widths. 19s are not going away anytime soon - still very popular. Also, for 981 there is a much better selection of Summer, Extreme Summer, and R-comp tires in 19s.
 

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Apex is doing a Group buy on their new 19" wheel, right now (Cayman/Boxter fitments). Fantastic wheels, opportunity for great price.


Also, they have complied an excellent fitment guide for 981 here:

This will show you many of the options in tire sizes.
 

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Porsche Cayman 981 2013
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I was using 19 on Pzero N spec. Changed to 18 street/track wheel on MPSS increased width to 245/40/ front plus -2 camber and 275/40 rear More grip on 18 and much smoother ride. Front and rear equally grippy no longer rear goes first.
 

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2015 Boxster, Manual Mason & Hamlin AA
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IMG_1300.jpg


19"
Was afraid I wouldn't like them.
Absolutely love them.
 

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20's are much more sensible to potholes - i drove years on 19's and never had an issue, with 20's got damaged tire after 2 months.
I would go back to 19's in a heartbeat....
 
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Discussion Starter #39
20's are much more sensible to potholes - i drove years on 19's and never had an issue, with 20's got damaged tire after 2 months.
I would go back to 19's in a heartbeat....
That's what I'm trying to avoid with 20's. Thanks for the guidance.


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Mine came with 19” and I up’d to 20”. No perceptible change in ride.

19”


20”



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I have the same 20's as the picture above No ride issues at all and I think they are just about perfect for our wheel wells - the ride is not lowered, no PASM - excellent.
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