Changing from 21” to 20” wheels

Wheels, Tyres, Suspension, Chassis, Issues and Fixes
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r1flyguy
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Location: Worcestershire
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Changing from 21” to 20” wheels

Post by r1flyguy » Tue May 18, 2021 10:53 am

Hi All

Continuing from my other thread,

I may need replacement tyres and looking to refurb the wheels too.

New front tyres, circa £500 + refurb £700 (company i know and used before and know how good they are) = £1200+

If I fitted new rears too, that touching £1900 maybe...

I’ve located a set of freshly refurbed 20” RS wheels with Michelin Latitude Sport 3 tyres and TPMS fitted for just a touch more.

I like the look of the wheels too and i can just get my current wheels refurbed at my leisure then :D

Question
Will there be any discernible ride difference going from 21” to 20” wheels ?

My MacanDS has air suspension if that makes any difference

Cheers
Current - 2015 Macan SD
Current - 2014 991.1 TurboS
Previous - 2008 997 Turbo traded for TurboS
Previous - 2003 986 BoxsterS Sold due to needing a 3rd seat :D

jonnydrama
Posts: 122
Joined: Fri Nov 16, 2018 8:27 pm

Re: Changing from 21” to 20” wheels

Post by jonnydrama » Tue May 18, 2021 11:02 am

I have 21's for summer and 20's for winter. The 20' are noticeably better in every way, they really are the sweet spot for the Macan.

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r1flyguy
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Re: Changing from 21” to 20” wheels

Post by r1flyguy » Tue May 18, 2021 2:52 pm

jonnydrama wrote:
Tue May 18, 2021 11:02 am
I have 21's for summer and 20's for winter. The 20' are noticeably better in every way, they really are the sweet spot for the Macan.
Interesting, may i ask why?

I have 20” wheels on the 911 but obviously thats chalk & cheese :D
Current - 2015 Macan SD
Current - 2014 991.1 TurboS
Previous - 2008 997 Turbo traded for TurboS
Previous - 2003 986 BoxsterS Sold due to needing a 3rd seat :D

MikeM
Posts: 1405
Joined: Tue Nov 17, 2015 11:13 pm

Re: Changing from 21” to 20” wheels

Post by MikeM » Tue May 18, 2021 4:59 pm

Agree, had both on air and the 20” gives a far better overall ride. Currently a full set of 21” Michelin’s via Black circle is £910, the rears are actually cheaper than the front.
Previous Porsche’s
2008. Boxster S Sport
2012. 991 S
2016. Macan Turbo http://www.porsche-code.com/PHKPBML4
Current
2020. Macan GTS http://www.porsche-code.com/PM5815A9

jonnydrama
Posts: 122
Joined: Fri Nov 16, 2018 8:27 pm

Re: Changing from 21” to 20” wheels

Post by jonnydrama » Tue May 18, 2021 7:07 pm

r1flyguy wrote:
Tue May 18, 2021 2:52 pm
jonnydrama wrote:
Tue May 18, 2021 11:02 am
I have 21's for summer and 20's for winter. The 20' are noticeably better in every way, they really are the sweet spot for the Macan.
Interesting, may i ask why?

I have 20” wheels on the 911 but obviously thats chalk & cheese :D
Comfier on the 20's, cheaper tyres and to be honest I think they look better. The RS Spyders for me is the best looking wheel I've seen in a long time.

gasgas1
Posts: 263
Joined: Thu Jul 19, 2018 8:35 am
Location: Devon

Re: Changing from 21” to 20” wheels

Post by gasgas1 » Tue May 18, 2021 8:18 pm

i agree 20" with air, just perfect.

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Kleynie
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Re: Changing from 21” to 20” wheels

Post by Kleynie » Tue May 18, 2021 9:16 pm

I have 20” spyders as winters and 21” for summers, I’m on air in my diesel and I don’t actually notice that much difference, but my winters are Dunlop and summers are Michelin, I think Michelin are the better tyres.

Also, I’ve said it before, Costco sell a full set of 21” Michelin Latitude for £770 fitted. I would use Lepsons for the refurb.
2017 Macan SD in Volcano with 21” 911 wheels, full black leather. Air, PASM, PDLS+, sports exhaust, pano roof, Sports Chrono, 18 way seats, BOSE, ventilated front seats, heated seats front and rear, speed limit display, active cruise, PS plus and more

On-Track
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Location: Staffordshire

Re: Changing from 21” to 20” wheels

Post by On-Track » Thu May 20, 2021 5:43 pm

r1flyguy wrote:
Tue May 18, 2021 2:52 pm
jonnydrama wrote:
Tue May 18, 2021 11:02 am
I have 21's for summer and 20's for winter. The 20' are noticeably better in every way, they really are the sweet spot for the Macan.
Interesting, may i ask why?

I have 20” wheels on the 911 but obviously thats chalk & cheese :D
The tread width is the same for both 20" and 21" wheels but the sidewall is taller on the 20" (21": F=265/40, R=295/35; 20": F=265/45, R=295/40). OK, the difference is only 13.25mm on the front and 14.75mm on the rears but it makes the sidewall more pliable which improves the ride. You can probably debate forever how noticeable it is :D
Peter

Current: 2020 Carmine Red GTS http://www.porsche-code.com/PMST9ZI9
Gone- 2015 Sapphire Blue Diesel
Gone -2013 Cayenne Diesel

MikeM
Posts: 1405
Joined: Tue Nov 17, 2015 11:13 pm

Re: Changing from 21” to 20” wheels

Post by MikeM » Thu May 20, 2021 6:47 pm

On-Track wrote:
Thu May 20, 2021 5:43 pm
r1flyguy wrote:
Tue May 18, 2021 2:52 pm
jonnydrama wrote:
Tue May 18, 2021 11:02 am
I have 21's for summer and 20's for winter. The 20' are noticeably better in every way, they really are the sweet spot for the Macan.
Interesting, may i ask why?

I have 20” wheels on the 911 but obviously thats chalk & cheese :D
The tread width is the same for both 20" and 21" wheels but the sidewall is taller on the 20" (21": F=265/40, R=295/35; 20": F=265/45, R=295/40). OK, the difference is only 13.25mm on the front and 14.75mm on the rears but it makes the sidewall more pliable which improves the ride. You can probably debate forever how noticeable it is :D
With 20” also considerably less road wheel noise transmitted, especially noticeable if on a concrete motorway surface 😖
Previous Porsche’s
2008. Boxster S Sport
2012. 991 S
2016. Macan Turbo http://www.porsche-code.com/PHKPBML4
Current
2020. Macan GTS http://www.porsche-code.com/PM5815A9

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