8x18" 225/40

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yeahhnl
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Posts: 1
Joined: Sat Jan 09, 2021 4:19 pm
Drives: Polo GTI 2018
Location: Finland

8x18" 225/40

Post by yeahhnl »

Would 8x18" wheels with 225/40 tyres cause any problems on the Polo GTI (AW)?
I'm just wondering would they fit nicely and would it affect the speedometer too much?
POLO Clive
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Posts: 276
Joined: Mon Jun 25, 2018 10:56 am
Drives: Polo SEL 1.0 TSI 115PS
Location: North Yorkshire

Re: 8x18" 225/40

Post by POLO Clive »

I think you should find all the info you need here > https://www.uk-polos.net/viewtopic.php?f=71&t=74604
SRGTD
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Joined: Sun Oct 11, 2015 9:40 pm
Drives: 2020 AW Polo GTI+, Pure White.
Location: UK

Re: 8x18" 225/40

Post by SRGTD »

Welcome to the forum @yeahhnl.

You’ll need to consider the wheel offset as well as wheel width, wheel diameter and tyre size. A quick search on this forum board for 8Jx18” returned the following discussion threads that should help you;

https://www.uk-polos.net/viewtopic.php? ... 8”#p547594

https://www.uk-polos.net/viewtopic.php? ... 8”#p573667

https://www.uk-polos.net/viewtopic.php? ... 8”#p564590

https://www.uk-polos.net/viewtopic.php? ... 8”#p558386

Quite a few GTI owners on the forum have fitted 225/40 R18’s. There’s a useful calculator on www.willtheyfit.com which will calculate the critical differences of any new wheel / tyre combination you’re thinking of getting compared to your existing wheel / tyre set up. If you go for an 8J wheel with too aggressive an offset and 225/40 R18 tyres, then it increases the risk of rubbing / clearance issues. However, once you’ve input your existing and new wheel / tyre details into the calculator and you know the critical differences, you should have a better idea if your preferred set up will work.

Bear in mind that;
  • the spoke design on some aftermarket wheels might give insufficient clearance between the reverse side of the spokes and the brake calipers. If so, it might be necessary to fit spacers to give adequate clearance, which would in turn increase the risk of the front face of the wheel and tyre protruding too far outwards and making contact with the wheel arch edge when the suspension is under load.
  • if your car is lowered - or if you’re planning on lowering it at some time in the future - fitting wider wheels and tyres increases the risk of rubbing issues.
green justin
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Drives: 2019 Polo GTI
Location: South Africa

Re: 8x18" 225/40

Post by green justin »

yeahhnl wrote: Sat Jan 09, 2021 4:31 pm Would 8x18" wheels with 225/40 tyres cause any problems on the Polo GTI (AW)?
I'm just wondering would they fit nicely and would it affect the speedometer too much?
Yes they fit even with 35mm lowering springs.
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