space saver tyre/wheel

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fabmacan
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Joined: Fri Jul 05, 2019 10:19 am
Location: NE Scotland

Post by fabmacan »

would a space saver wheel with 195/75/18 tyre work as a replacement for a 21 inch wheel in an emergency?
2023 Macan GTS
Gulf Orange
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MikeM
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Post by MikeM »

fabmacan wrote: ↑Sun Feb 18, 2024 1:30 pm would a space saver wheel with 195/75/18 tyre work as a replacement for a 21 inch wheel in an emergency?
Gen3 GTS has PSCB’s as standard and this requires a 19” diameter drum I would guess for adequate clearance of the discs?
Previous Porsche’s
2008. 987 Boxster S Sport basalt
2012. 991 Carrera S aqua
2016. Macan Turbo volcano
2020. Macan GTS crayon (sold 04/24)
Awaiting delivery
2024. Macan GTS gentian. mid May https://configurator.porsche.com/porsche-code/PR8H7WC6
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Bluesnose1812
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Post by Bluesnose1812 »

The rolling circumference of Macan wheels are the same regardless of nominal wheel diameter. So if the space saver is for a Macan it's OK.
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Scooby_Doo
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Post by Scooby_Doo »

Bluesnose1812 wrote: ↑Sun Feb 18, 2024 8:26 pm The rolling circumference of Macan wheels are the same regardless of nominal wheel diameter. So if the space saver is for a Macan it's OK.
Not if the rim is too small to fit over the calipers.
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On-Track
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Post by On-Track »

Bluesnose1812 wrote: ↑Sun Feb 18, 2024 8:26 pm The rolling circumference of Macan wheels are the same regardless of nominal wheel diameter. So if the space saver is for a Macan it's OK.
The reason the rolling radius of the wheels is the same is that smaller diameter wheel centres have tyres with taller side walls. As Scooby has said, 18" wheels do not fit a GTS. I don't know what the front disc diameter is on the S but if they're 260mm then you can't use 18" wheels on these either.
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Current: 2020 Carmine Red GTS http://www.porsche-code.com/PMST9ZI9
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MooseMiller
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Joined: Thu Jul 27, 2023 10:30 am

Post by MooseMiller »

On-Track wrote: ↑Mon Feb 19, 2024 9:44 am
Bluesnose1812 wrote: ↑Sun Feb 18, 2024 8:26 pm The rolling circumference of Macan wheels are the same regardless of nominal wheel diameter. So if the space saver is for a Macan it's OK.
The reason the rolling radius of the wheels is the same is that smaller diameter wheel centres have tyres with taller side walls. As Scooby has said, 18" wheels do not fit a GTS. I don't know what the front disc diameter is on the S but if they're 260mm then you can't use 18" wheels on these either.
If it helps, I have an 'S' and have an 18" collapsible spare from the factory order so I would assume that it works ok
(my understanding is the 19" option is for GTS but you would need to confirm with your OPC that point)
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MikeM
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Joined: Tue Nov 17, 2015 11:13 pm

Post by MikeM »

Fab Macan has a GTS (it’s in his signature) the 18” wheel is NOT compatible 🙄

IMG_1627.png

Previous Porsche’s
2008. 987 Boxster S Sport basalt
2012. 991 Carrera S aqua
2016. Macan Turbo volcano
2020. Macan GTS crayon (sold 04/24)
Awaiting delivery
2024. Macan GTS gentian. mid May https://configurator.porsche.com/porsche-code/PR8H7WC6
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fabmacan
Posts: 83
Joined: Fri Jul 05, 2019 10:19 am
Location: NE Scotland

Post by fabmacan »

Thanks for the info guys, yes the wheel is for a macan, but as you state, the PCCB discs are massive.
2023 Macan GTS
Gulf Orange
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